Preview Extract

Chapter 02
1. A change in a physical quantity w having initial value wi and final value wf is given by which of the following?
a. wi โ wf
b. wf โ wi
c. (wf + wi)/2
d. none of the above
ANSWER:
b
POINTS:
1
DIFFICULTY:
1
QUESTION TYPE: Multiple Choice
HAS VARIABLES: False
TOPICS:
2.1 Displacement, Velocity, and Acceleration
DATE CREATED: 7/6/2016 4:38 PM
DATE MODIFIED: 7/6/2016 4:38 PM
2. Displacement is which of the following types of quantities?
a. vector
b. scalar
c. magnitude
d. dimensional
ANSWER:
a
POINTS:
1
DIFFICULTY:
1
QUESTION TYPE: Multiple Choice
HAS VARIABLES: False
TOPICS:
2.1 Displacement, Velocity, and Acceleration
DATE CREATED: 7/6/2016 4:38 PM
DATE MODIFIED: 7/6/2016 4:38 PM
3. A truck moves 80.0 m east, then moves 140.0 m west, and finally moves east again a distance of 80.0 m. If east is
chosen as the positive direction, what is the truck’s resultant displacement?
a. 20.0 m
b. โ20.0 m
c. 300.0 m
d. โ300.0 m
e. 140.0 m
ANSWER:
a
POINTS:
1
DIFFICULTY:
2
QUESTION TYPE: Multiple Choice
HAS VARIABLES: True
TOPICS:
2.1 Displacement, Velocity, and Acceleration
DATE CREATED: 7/6/2016 4:38 PM
DATE MODIFIED: 12/30/2016 12:38 AM
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Chapter 02
4. Which of the following is not a vector quantity?
a. temperature
b. velocity
c. acceleration
d. displacement
ANSWER:
a
POINTS:
1
DIFFICULTY:
1
QUESTION TYPE: Multiple Choice
HAS VARIABLES: False
TOPICS:
2.1 Displacement, Velocity, and Acceleration
DATE CREATED: 7/6/2016 4:38 PM
DATE MODIFIED: 7/6/2016 4:38 PM
5. In one-dimensional motion, the average speed of an object that moves from one place to another and then back to its
original place has which of the following properties?
a. It is positive.
b. It is negative.
c. It is zero.
d. It can be positive, negative, or zero.
ANSWER:
a
POINTS:
1
DIFFICULTY:
2
QUESTION TYPE: Multiple Choice
HAS VARIABLES: False
TOPICS:
2.1 Displacement, Velocity, and Acceleration
DATE CREATED: 7/6/2016 4:38 PM
DATE MODIFIED: 7/6/2016 4:38 PM
6. In one-dimensional motion where the direction is indicated by a plus or minus sign, the average velocity of an object
has which of the following properties?
a. It is positive.
b. It is negative.
c. It is zero.
d. It can be positive, negative, or zero.
ANSWER:
d
POINTS:
1
DIFFICULTY:
1
QUESTION TYPE: Multiple Choice
HAS VARIABLES: False
TOPICS:
2.1 Displacement, Velocity, and Acceleration
DATE CREATED: 7/6/2016 4:38 PM
DATE MODIFIED: 7/6/2016 4:38 PM
7. An object moves 10 m east in 30 s and then returns to its starting point taking an additional 50 s. If west is chosen as the
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Chapter 02
positive direction, what is the sign associated with the average velocity of the object?
a. +
b. โ
c. 0 (no sign)
d. any of the above
ANSWER:
c
POINTS:
1
DIFFICULTY:
1
QUESTION TYPE: Multiple Choice
HAS VARIABLES: True
TOPICS:
2.1 Displacement, Velocity, and Acceleration
DATE CREATED: 7/6/2016 4:38 PM
DATE MODIFIED: 7/6/2016 4:38 PM
8. An object moves 10.0 m east in 10.0 s and then returns to its starting point taking an additional 40.0 s. If west is chosen
as the positive direction, what is the average speed of the object?
a. 0.4 m/s
b. โ0.4 m/s
c. 10.0 m/s
d. 0 m/s
e. โ10.0
ANSWER:
a
POINTS:
1
DIFFICULTY:
2
QUESTION TYPE: Multiple Choice
HAS VARIABLES: True
TOPICS:
2.1 Displacement, Velocity, and Acceleration
DATE CREATED: 7/6/2016 4:38 PM
DATE MODIFIED: 11/13/2016 10:32 PM
9. A bird, accelerating from rest at a constant rate, experiences a displacement of 22 m in 10 s. What is the average
velocity?
a. 1.2 m/s
b. 2.2 m/s
c. 2.4 m/s
d. 0 m/s
e. 0.5 m/s
ANSWER:
b
POINTS:
1
DIFFICULTY:
1
QUESTION TYPE: Multiple Choice
HAS VARIABLES: True
TOPICS:
2.1 Displacement, Velocity, and Acceleration
DATE CREATED: 7/6/2016 4:38 PM
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DATE MODIFIED: 12/30/2016 12:41 AM
10. A cheetah can run at approximately 100 km/h and a gazelle at 80.0 km/h. If both animals are running at full speed,
with the gazelle 50.0 m ahead, how long before the cheetah catches its prey?
a. 9.0 s
b. 14 s
c. 18 s
d. 4.5 s
e. 21 s
ANSWER:
a
POINTS:
1
DIFFICULTY:
2
QUESTION TYPE: Multiple Choice
HAS VARIABLES: True
TOPICS:
2.1 Displacement, Velocity, and Acceleration
DATE CREATED: 7/6/2016 4:38 PM
DATE MODIFIED: 12/30/2016 12:43 AM
11. A cheetah can maintain its maximum speed of 96.0 km/hr for 26.0 seconds. What minimum distance must a gazelle
running 85.0 km/hr be ahead of the cheetah to escape?
a. 96 m
b. 79 m
c. 40 m
d. 73 m
e. 67 m
ANSWER:
b
POINTS:
1
DIFFICULTY:
3
QUESTION TYPE: Multiple Choice
HAS VARIABLES: True
TOPICS:
2.1 Displacement, Velocity, and Acceleration
DATE CREATED: 7/6/2016 4:38 PM
DATE MODIFIED: 12/30/2016 12:44 AM
12. Jeff throws a ball straight up. For which situation is the vertical velocity zero?
a. on the way up
b. at the top
c. on the way back down
d. none of the above
ANSWER:
b
POINTS:
1
DIFFICULTY:
1
QUESTION TYPE: Multiple Choice
HAS VARIABLES: False
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Chapter 02
TOPICS:
2.1 Displacement, Velocity, and Acceleration
DATE CREATED: 7/6/2016 4:38 PM
DATE MODIFIED: 7/6/2016 4:38 PM
13. A railroad train travels forward along a straight track at 90.0 m/s for 1 000 m and then travels at 70.0 m/s for the next
1 000 m. What is the average velocity?
a. 79.3 m/s
b. 78.8 m/s
c. 83.8 m/s
d. 75.8 m/s
e. 81.5 m/s
ANSWER:
b
POINTS:
1
DIFFICULTY:
2
QUESTION TYPE: Multiple Choice
HAS VARIABLES: True
TOPICS:
2.1 Displacement, Velocity, and Acceleration
DATE CREATED: 7/6/2016 4:38 PM
DATE MODIFIED: 12/30/2016 12:47 AM
14. The distance of the Earth from the Sun is 93 000 000 miles. If there are 3.15 ร 107 s in one year, find the speed of the
Earth in its orbit about the Sun.
a. 9.28 miles/s
b. 18.6 miles/s
c. 27.9 miles/s
d. 37.2 miles/s
ANSWER:
b
POINTS:
1
DIFFICULTY:
2
QUESTION TYPE: Multiple Choice
HAS VARIABLES: False
TOPICS:
2.1 Displacement, Velocity, and Acceleration
DATE CREATED: 7/6/2016 4:38 PM
DATE MODIFIED: 11/13/2016 6:34 PM
15. A ball is thrown vertically upwards at 19.0 m/s. For its complete trip (up and back down to the starting position), its
average velocity is:
a. 19.0 m/s.
b. 9.5 m/s.
c. 4.8 m/s.
d. 14.3 m/s
e. not given.
ANSWER:
e
POINTS:
1
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Chapter 02
DIFFICULTY:
2
QUESTION TYPE: Multiple Choice
HAS VARIABLES: True
TOPICS:
2.1 Displacement, Velocity, and Acceleration
DATE CREATED: 7/6/2016 4:38 PM
DATE MODIFIED: 12/30/2016 12:49 AM
16. Changing the positive direction in a reference frame to the opposite direction does not change the sign of which of the
following quantities?
a. velocity
b. average velocity
c. speed
d. displacement
ANSWER:
c
POINTS:
1
DIFFICULTY:
1
QUESTION TYPE: Multiple Choice
HAS VARIABLES: False
TOPICS:
2.1 Displacement, Velocity, and Acceleration
DATE CREATED: 7/6/2016 4:38 PM
DATE MODIFIED: 7/6/2016 4:38 PM
17. On a position-versus-time graph, the slope of the straight line joining two points on the plotted curve that are separated
in time by the interval ฮt, is which of the following quantities?
a. average steepness
b. average velocity
c. instantaneous velocity
d. average acceleration
ANSWER:
b
POINTS:
1
DIFFICULTY:
1
QUESTION TYPE: Multiple Choice
HAS VARIABLES: False
TOPICS:
2.1 Displacement, Velocity, and Acceleration
DATE CREATED: 7/6/2016 4:38 PM
DATE MODIFIED: 11/13/2016 6:35 PM
18. Consider the magnitude of the average speed, vavg, speed, mag, and the magnitude of the average velocity, vavg, velocity,
mag, for the same trip. Which of the following is always true?
a. vavg, speed, mag = vavg, velocity, mag
b. vavg, speed, mag โฅ vavg, velocity, mag
c. vavg, speed, mag โค vavg, velocity, mag
d. none of the above
ANSWER:
b
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POINTS:
1
QUESTION TYPE: Multiple Choice
HAS VARIABLES: False
TOPICS:
2.1 Displacement, Velocity, and Acceleration
DATE CREATED: 7/6/2016 4:38 PM
DATE MODIFIED: 12/23/2016 6:40 PM
19. A European sports car dealer claims that his car will accelerate at a constant rate from rest to 100 km/h in 8.00 s. If so,
what is the acceleration? (Hint: First convert speed to m/s.)
a. 3.47 m/s2
b. 6.94 m/s2
c. 5.21 m/s2
d. 10.4 m/s2
e. 8.68 m/s2
ANSWER:
a
POINTS:
1
DIFFICULTY:
2
QUESTION TYPE: Multiple Choice
HAS VARIABLES: True
TOPICS:
2.1 Displacement, Velocity, and Acceleration
DATE CREATED: 7/6/2016 4:38 PM
DATE MODIFIED: 12/30/2016 12:51 AM
20. A European sports car dealer claims that his product will accelerate at a constant rate from rest to a speed of 100
km/hr in 8.00 s. What is the speed after the first 4.00 s of acceleration? (Hint: First convert the speed to m/s.)
a. 27.8 m/s
b. 41.7 m/s
c. 20.9 m/s
d. 13.9 m/s
e. 6.95 m/s
ANSWER:
d
POINTS:
1
DIFFICULTY:
2
QUESTION TYPE: Multiple Choice
HAS VARIABLES: True
TOPICS:
2.1 Displacement, Velocity, and Acceleration
DATE CREATED: 7/6/2016 4:38 PM
DATE MODIFIED: 12/30/2016 12:53 AM
21. An x vs. t graph is drawn for a ball moving in one direction. The graph starts at the origin and at t = 5 s the velocity of
the ball is zero. We can be positive that at t = 5 s,
a. the slope of the curve is non-zero.
b. the ball has stopped.
c. the acceleration is constant.
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d. the curve is at x = 0, t = 0.
ANSWER:
b
POINTS:
1
DIFFICULTY:
1
QUESTION TYPE: Multiple Choice
HAS VARIABLES: False
TOPICS:
2.1 Displacement, Velocity, and Acceleration
DATE CREATED: 7/6/2016 4:38 PM
DATE MODIFIED: 7/6/2016 4:38 PM
22. A v vs. t graph is drawn for a ball moving in one direction. The graph starts at the origin and at t = 5 s the acceleration
of the ball is zero. We know that at t = 5 s,
a. the slope of the curve is non-zero.
b. the velocity of the ball is not changing.
c. the curve is not crossing the time axis.
d. the curve is at v = 0, t = 0.
ANSWER:
b
POINTS:
1
DIFFICULTY:
1
QUESTION TYPE: Multiple Choice
HAS VARIABLES: False
TOPICS:
2.1 Displacement, Velocity, and Acceleration
DATE CREATED: 7/6/2016 4:38 PM
DATE MODIFIED: 7/6/2016 4:38 PM
23. The value of an object’s acceleration may be characterized in equivalent words by which of the following?
a. displacement
b. rate of change of displacement
c. velocity
d. rate of change of velocity
ANSWER:
d
POINTS:
1
DIFFICULTY:
1
QUESTION TYPE: Multiple Choice
HAS VARIABLES: False
TOPICS:
2.1 Displacement, Velocity, and Acceleration
DATE CREATED: 7/6/2016 4:38 PM
DATE MODIFIED: 7/6/2016 4:38 PM
24. A 50.0-g ball traveling at 22.0 m/s is bounced off a brick wall and rebounds at 21.0 m/s. A high-speed camera records
this event. If the ball is in contact with the wall for 2.50 ms, what is the average acceleration of the ball during this time
interval?
a. 1.72E+4 m/s2
b. 3.44E+4 m/s2
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c. 8.60E+3 m/s2
d. 1.72E+1 m/s2
e. 4.30E+1 m/s2
ANSWER:
a
POINTS:
1
DIFFICULTY:
2
QUESTION TYPE: Multiple Choice
HAS VARIABLES: True
TOPICS:
2.1 Displacement, Velocity, and Acceleration
DATE CREATED: 7/6/2016 4:38 PM
DATE MODIFIED: 12/30/2016 12:54 AM
25. The slope of the acceleration vs. time curve represents
a. the velocity.
b. the rate of change of acceleration.
c. the rate of change of displacement.
d. the area under the position vs. time curve.
ANSWER:
b
POINTS:
1
DIFFICULTY:
2
QUESTION TYPE: Multiple Choice
HAS VARIABLES: False
TOPICS:
2.1 Displacement, Velocity, and Acceleration
DATE CREATED: 7/6/2016 4:38 PM
DATE MODIFIED: 8/14/2016 1:28 PM
26. Starting from rest, a car accelerates down a straight road with constant acceleration a for a time t, then the direction of
the acceleration is reversed, (i.e., it is โa), and the car comes to a stop in an additional time t, the time for the whole trip
being 2t. At what time, or times, is the average velocity of the car for the trip equal to its instantaneous velocity during the
trip?
a. There is no such time.
b. It is at the halfway point at t.
c. This occurs at 2 times, 0.5t and 1.5t.
d. This occurs at 2 times, 0.707t and 1.293t.
ANSWER:
c
POINTS:
1
DIFFICULTY:
2
QUESTION TYPE: Multiple Choice
HAS VARIABLES: False
TOPICS:
2.1 Displacement, Velocity, and Acceleration
DATE CREATED: 7/6/2016 4:38 PM
DATE MODIFIED: 12/29/2016 3:37 PM
27. In which of the following cases is the displacement’s magnitude half the distance traveled?
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a. 10 steps east followed by 3 steps west
b. 28 steps east followed by 14 steps west
c. 6 steps east followed by 24 steps west
d. 12 steps east followed by 4 steps west
e. 5 steps east followed by 25 steps west
ANSWER:
d
POINTS:
1
DIFFICULTY:
2
QUESTION TYPE: Multiple Choice
HAS VARIABLES: True
TOPICS:
2.1 Displacement, Velocity, and Acceleration
DATE CREATED: 7/6/2016 4:38 PM
DATE MODIFIED: 12/23/2016 6:48 PM
28. Which formula is dimensionally consistent with an expression yielding a value for velocity? (a is acceleration, x is
distance, and t is time)
a. v/t2
b. vx2
c. v2/t
d. at
ANSWER:
d
POINTS:
1
DIFFICULTY:
1
QUESTION TYPE: Multiple Choice
HAS VARIABLES: False
TOPICS:
2.1 Displacement, Velocity, and Acceleration
DATE CREATED: 1/13/2014 1:31 PM
DATE MODIFIED: 8/1/2016 4:38 PM
29. If a is acceleration, v is velocity, x is position, and t is time, then which equation is not dimensionally correct?
a. t = x/v
b. a = v2/x
c. v = a/t
d. t2 = 2x/a
ANSWER:
c
POINTS:
1
DIFFICULTY:
1
QUESTION TYPE: Multiple Choice
HAS VARIABLES: False
TOPICS:
2.1 Displacement, Velocity, and Acceleration
DATE CREATED: 1/13/2014 1:31 PM
DATE MODIFIED: 8/1/2016 4:38 PM
30. A ball is pushed downhill with an initial velocity of 3.0 m/s. The ball rolls down a hill with a constant acceleration of
1.6 m/s2. The ball reaches the bottom of the hill in 6.0 s. What is the ballโs velocity at the bottom of the hill?
a. 10 m/s
b. 13 m/s
c. 16 m/s
d. 17 m/s
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ANSWER:
b
POINTS:
1
DIFFICULTY:
2
QUESTION TYPE: Multiple Choice
HAS VARIABLES: False
TOPICS:
2.1 Displacement, Velocity, and Acceleration
DATE CREATED: 1/13/2014 1:31 PM
DATE MODIFIED: 8/1/2016 4:52 PM
31. An object moves at a constant velocity of 12 m/s to the southwest for an interval of 20 s. Halfway through this
interval, what is the magnitude of its instantaneous velocity?
a. It can be any value from 0 to 24 m/s.
b. 6 m/s
c. 12 m/s
d. More information is needed.
ANSWER:
c
POINTS:
1
DIFFICULTY:
1
QUESTION TYPE: Multiple Choice
HAS VARIABLES: False
TOPICS:
2.1 Displacement, Velocity, and Acceleration
DATE CREATED: 1/13/2014 1:31 PM
DATE MODIFIED: 8/1/2016 4:53 PM
32. A car is moving along a straight highway and accelerates at a constant rate while going from point A to point B. If the
acceleration is positive, increasing the speed of the car, where does the position where the instantaneous speed equals the
average speed occur for the interval from A to B?
a. midway between A and B
b. closer to A than to B
c. closer to B than to A
d. Any of the answers could be correct depending on the original speed.
ANSWER:
b
POINTS:
1
DIFFICULTY:
2
QUESTION TYPE: Multiple Choice
HAS VARIABLES: False
TOPICS:
2.1 Displacement, Velocity, and Acceleration
DATE CREATED: 1/13/2014 1:31 PM
DATE MODIFIED: 8/1/2016 4:55 PM
33. A car is moving in the positive direction along a straight highway and accelerates at a constant rate while going from
point A to point B. If the acceleration is positive, increasing the speed of the car, when does the position where the
average speed equals the instantaneous speed occur during the time interval from A to B? Assume the time interval is T.
a. T/2 from the start of the interval
b. before T/2 from the start of the interval
c. after T/2 from the start of the interval
d. It depends on the speed at the start of the time interval.
ANSWER:
a
POINTS:
1
DIFFICULTY:
2
QUESTION TYPE: Multiple Choice
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HAS VARIABLES:
TOPICS:
DATE CREATED:
DATE MODIFIED:
False
2.1 Displacement, Velocity, and Acceleration
1/13/2014 1:31 PM
8/1/2016 4:57 PM
34. Suppose a particle is moving along a straight line with a speed v for a time t, then stops for a time t, and then resumes
moving along the original direction with speed v for time t. What has been the average speed of the particle for the total
time period 3t?
a. v
b.
c. 1.5v
d.
ANSWER:
b
POINTS:
1
DIFFICULTY:
2
QUESTION TYPE: Multiple Choice
HAS VARIABLES: False
TOPICS:
2.1 Displacement, Velocity, and Acceleration
DATE CREATED: 1/13/2014 1:31 PM
DATE MODIFIED: 12/29/2016 3:38 PM
35. On a position-time graph for a particle, suppose the plot starts at some positive position and as the time goes on the
curve gets steeper and steeper while curving upwards. Which of the following must be true?
a. The speed of the particle is constant.
b. The acceleration of the particle is constant.
c. The speed of the particle is decreasing.
d. The acceleration of the particle is positive.
ANSWER:
d
POINTS:
1
DIFFICULTY:
2
QUESTION TYPE: Multiple Choice
HAS VARIABLES: False
TOPICS:
2.1 Displacement, Velocity, and Acceleration
DATE CREATED: 1/13/2014 1:31 PM
DATE MODIFIED: 8/1/2016 5:00 PM
36. On a velocity-time graph for a particle, suppose the plot starts at some positive velocity and then follows a straight line
to zero at a later time. Which of the following must be true about a position vs. time graph for this same time interval?
a. The curve will start at a positive position value and follow a straight line to zero at the later time.
b. The curve will rise steeply at first and as time goes on will level out approaching its highest position value at
the later time.
c. The curve will drop steeply at first and as time goes on will approach its lowest position value at the later time
d. The curve will start at the zero of position and follow a straight line to its highest position at the later time.
ANSWER:
b
POINTS:
1
DIFFICULTY:
2
QUESTION TYPE: Multiple Choice
HAS VARIABLES: False
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TOPICS:
2.1 Displacement, Velocity, and Acceleration
DATE CREATED: 1/13/2014 1:31 PM
DATE MODIFIED: 8/1/2016 5:03 PM
37. A rock is rolled in the sand. It starts at 5.0 m/s, moves in a straight line for a distance of 6.0 m, and then stops. What is
the magnitude of the average acceleration?
a. 2.1 m/s2
b. 4.2 m/s2
c. 5.4 m/s2
d. 6.2 m/s2
ANSWER:
a
POINTS:
1
DIFFICULTY:
2
QUESTION TYPE: Multiple Choice
HAS VARIABLES: False
TOPICS:
2.1 Displacement, Velocity, and Acceleration
DATE CREATED: 1/13/2014 1:32 PM
DATE MODIFIED: 8/1/2016 5:08 PM
38. An object moves along the x axis, with its position given by the function x(t) = ยฝ t3. Which of the following can be
obtained from a graph of x vs. t?
a. The velocity of the object at any instant in time
b. The displacement of the object during a specified time interval
c. The speed of the particle at any instant in time
d. The average velocity of the object during as specified time interval
e. All of the above
ANSWER:
e
POINTS:
1
DIFFICULTY:
2
QUESTION TYPE: Multiple Choice
HAS VARIABLES: False
TOPICS:
2.1 Displacement, Velocity, and Acceleration
NOTES:
New item
DATE CREATED: 8/17/2016 10:16 PM
DATE MODIFIED: 8/17/2016 10:17 PM
39. A strobe photograph shows equally-spaced images of a car moving along a straight road. If the time intervals between
images is constant, which of the following cannot be positive?
a. the speed of the car
b. the average velocity of the car
c. the acceleration of the car
d. the direction of motion of the car
ANSWER:
c
POINTS:
1
DIFFICULTY:
2
QUESTION TYPE: Multiple Choice
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HAS VARIABLES:
TOPICS:
DATE CREATED:
DATE MODIFIED:
False
2.2 Motion Diagrams
7/6/2016 4:38 PM
11/13/2016 6:36 PM
40. A strobe photograph of a car moving along a straight road shows the interval between each successive image to be
diminishing. If the direction of motion of the car is taken as positive, which of the following is/are negative?
a. the speed of the car
b. the average velocity of the car
c. the average acceleration of the car
d. all of the above
ANSWER:
c
POINTS:
1
DIFFICULTY:
2
QUESTION TYPE: Multiple Choice
HAS VARIABLES: False
TOPICS:
2.2 Motion Diagrams
DATE CREATED: 7/6/2016 4:38 PM
DATE MODIFIED: 8/2/2016 1:17 AM
41. A ball is pushed with an initial velocity of 4.0 m/s. The ball rolls down a hill with a constant acceleration of 1.7 m/s2.
The ball reaches the bottom of the hill in 7.0 s. What is the ball’s velocity at the bottom of the hill?
a. 15 m/s
b. 13 m/s
c. 14 m/s
d. 16 m/s
e. 19 m/s
ANSWER:
d
POINTS:
1
DIFFICULTY:
2
QUESTION TYPE: Multiple Choice
HAS VARIABLES: True
TOPICS:
2.3 One-Dimensional Motion with Constant Acceleration
DATE CREATED: 7/6/2016 4:38 PM
DATE MODIFIED: 12/30/2016 12:55 AM
42. A cart is given an initial velocity of 5.0 m/s and experiences a constant acceleration of 2.4 m/s2. What is the
magnitude of the cart’s displacement during the first 5.0 s of its motion?
a. 35 m
b. 85 m
c. 55 m
d. 11 m
e. 17 m
ANSWER:
c
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POINTS:
1
DIFFICULTY:
2
QUESTION TYPE: Multiple Choice
HAS VARIABLES: True
TOPICS:
2.3 One-Dimensional Motion with Constant Acceleration
DATE CREATED: 7/6/2016 4:38 PM
DATE MODIFIED: 12/30/2016 12:57 AM
43. A vehicle designed to operate on a drag strip accelerates from zero to 34 m/s while undergoing a straight-line path
displacement of 48 m. What is the vehicle’s acceleration if its value may be assumed to be constant?
a. 9 m/s2
b. 6.0 m/s2
c. 12 m/s2
d. 18 m/s2
e. 24 m/s2
ANSWER:
c
POINTS:
1
DIFFICULTY:
2
QUESTION TYPE: Multiple Choice
HAS VARIABLES: True
TOPICS:
2.3 One-Dimensional Motion with Constant Acceleration
DATE CREATED: 7/6/2016 4:38 PM
DATE MODIFIED: 1/6/2017 11:53 PM
44. When a drag strip vehicle reaches a velocity of 65.0 m/s, it begins a negative acceleration by releasing a drag chute
and applying its brakes. While reducing its velocity back to zero, its acceleration along a straight-line path is a constant
โ7.10 m/s2. What displacement does it undergo during this deceleration period?
a. 595 m
b. 4.58 m
c. 2 110 m
d. 298 m
e. 9.15 m
ANSWER:
d
POINTS:
1
DIFFICULTY:
2
QUESTION TYPE: Multiple Choice
HAS VARIABLES: True
TOPICS:
2.3 One-Dimensional Motion with Constant Acceleration
DATE CREATED: 7/6/2016 4:38 PM
DATE MODIFIED: 12/30/2016 1:00 AM
45. A bird, accelerating from rest at a constant rate, experiences a displacement of 25 m in 15 s. What is the final velocity
after 15 s?
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Page 15
Chapter 02
a. 2.5 m/s
b. 1.7 m/s
c. 3.3 m/s
d. 3.8 m/s
e. zero
ANSWER:
c
POINTS:
1
DIFFICULTY:
2
QUESTION TYPE: Multiple Choice
HAS VARIABLES: True
TOPICS:
2.3 One-Dimensional Motion with Constant Acceleration
DATE CREATED: 7/6/2016 4:38 PM
DATE MODIFIED: 12/30/2016 1:02 AM
46. A bird, accelerating from rest at a constant rate, experiences a displacement of 25 m in 12 s. What is its acceleration?
a. 0.18 m/s2
b. 0.35 m/s2
c. 0.44 m/s2
d. 0.26 m/s2
e. 0.53 m/s2
ANSWER:
b
POINTS:
1
DIFFICULTY:
2
QUESTION TYPE: Multiple Choice
HAS VARIABLES: True
TOPICS:
2.3 One-Dimensional Motion with Constant Acceleration
DATE CREATED: 7/6/2016 4:38 PM
DATE MODIFIED: 12/30/2016 1:03 AM
47. A European sports car dealer claims that his product will accelerate at a constant rate from rest to a speed of 100 km/h
in 6.00 s. What distance will the sports car travel during the 6.00-s acceleration period? (Hint: First convert speed to m/s.)
a. 41.7 m
b. 58.3 m
c. 83.3 m
d. 167 m
e. 125 m
ANSWER:
c
POINTS:
1
DIFFICULTY:
2
QUESTION TYPE: Multiple Choice
HAS VARIABLES: True
TOPICS:
2.3 One-Dimensional Motion with Constant Acceleration
DATE CREATED: 7/6/2016 4:38 PM
Copyright Cengage Learning. Powered by Cognero.
Page 16
Chapter 02
DATE MODIFIED: 1/6/2017 11:56 PM
48. An automobile driver puts on the brakes and decelerates from 35.0 m/s to zero in 11.0 s. What distance does the car
travel?
a. 193 m
b. 97 m
c. 241 m
d. 290 m
e. 145 m
ANSWER:
a
POINTS:
1
DIFFICULTY:
2
QUESTION TYPE: Multiple Choice
HAS VARIABLES: True
TOPICS:
2.3 One-Dimensional Motion with Constant Acceleration
DATE CREATED: 7/6/2016 4:38 PM
DATE MODIFIED: 12/30/2016 1:07 AM
49. A drag racer starts from rest and accelerates at 8.0 m/s2 for the entire distance of 300 m. What is the velocity of the
race car at the end of the run?
a. 83 m/s
b. 69 m/s
c. 52 m/s
d. 35 m/s
e. 59 m/s
ANSWER:
b
POINTS:
1
DIFFICULTY:
2
QUESTION TYPE: Multiple Choice
HAS VARIABLES: True
TOPICS:
2.3 One-Dimensional Motion with Constant Acceleration
DATE CREATED: 7/6/2016 4:38 PM
DATE MODIFIED: 12/30/2016 1:08 AM
50. A Cessna aircraft has a lift-off speed of 135 km/h. What minimum constant acceleration does this require if the
aircraft is to be airborne after a take-off run of 260 m?
a. 2.70 m/s2
b. 1.35 m/s2
c. 3.38 m/s2
d. 5.41 m/s2
e. 2.03 m/s2
ANSWER:
POINTS:
a
1
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Page 17
Chapter 02
DIFFICULTY:
2
QUESTION TYPE: Multiple Choice
HAS VARIABLES: True
TOPICS:
2.3 One-Dimensional Motion with Constant Acceleration
DATE CREATED: 7/6/2016 4:38 PM
DATE MODIFIED: 12/30/2016 1:11 AM
51. If the displacement of an object is given in SI units by ฮx = โ3t + 4t 2, at t = 2 s its velocity and acceleration are,
respectively:
a. positive, positive.
b. positive, negative.
c. negative, negative.
d. negative, positive.
ANSWER:
a
POINTS:
1
DIFFICULTY:
3
QUESTION TYPE: Multiple Choice
HAS VARIABLES: False
TOPICS:
2.3 One-Dimensional Motion with Constant Acceleration
DATE CREATED: 7/6/2016 4:38 PM
DATE MODIFIED: 8/14/2016 1:29 PM
52. In the case of constant acceleration, the average velocity equals the instantaneous velocity:
a. at the beginning of the time interval.
b. at the end of the time interval.
c. half-way through the time interval.
d. three-fourths of the way through the time interval.
ANSWER:
c
POINTS:
1
DIFFICULTY:
2
QUESTION TYPE: Multiple Choice
HAS VARIABLES: False
TOPICS:
2.3 One-Dimensional Motion with Constant Acceleration
DATE CREATED: 7/6/2016 4:38 PM
DATE MODIFIED: 7/6/2016 4:38 PM
53. Two students are working on the same constant-acceleration problem involving a car undergoing constant
acceleration, having started from rest and after a certain time having traveled a distance of 108 m. The students are to find
the average velocity. Both students are required to show their work and round any intermediate answers as well as the
final answer properly to 3 significant figures. Each rounded answer is to be used in the next step of calculation as they
proceed. For the final answer, Student A uses the formula vavg = (xf โ xi)/(tf โ ti) getting the result 7.26 m/s, and Student B
uses the formula vavg = (v0 + v)/2 getting the result 7.29 m/s. Assuming neither student makes a mistake, which student
has the better answer?
a. Student A
b. Student B
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Page 18
Chapter 02
c. Under significant figure rounding, both answers are equally as good.
d. The described result cannot happen; this is physics after all.
ANSWER:
c
POINTS:
1
DIFFICULTY:
2
QUESTION TYPE: Multiple Choice
HAS VARIABLES: False
TOPICS:
2.3 One-Dimensional Motion with Constant Acceleration
DATE CREATED: 7/6/2016 4:38 PM
DATE MODIFIED: 11/13/2016 6:37 PM
54. A speeding car traveling at a constant velocity of 24 m/s passes a police care initially at rest beside the roadway. If the
police car with constant acceleration of 3.0 m/s2 immediately pursues the speeding car, how far down the road does it
draw even with the speeding car?
a. 190 m
b. 290 m
c. 380 m
d. 770 m
ANSWER:
c
POINTS:
1
DIFFICULTY:
3
QUESTION TYPE: Multiple Choice
HAS VARIABLES: False
TOPICS:
2.3 One-Dimensional Motion with Constant Acceleration
NOTES:
Revised item
DATE CREATED: 1/13/2014 1:32 PM
DATE MODIFIED: 8/14/2016 1:34 PM
55. A speeding car traveling at a constant velocity of v passes a police car initially at rest beside the roadway. If the police
car with constant acceleration of a immediately pursues the speeding car, how long is it before the police car is directly
behind the speeding car?
a. v/a
b. 2v/a
c. v/2a
d. v2/a
ANSWER:
b
POINTS:
1
DIFFICULTY:
2
QUESTION TYPE: Multiple Choice
HAS VARIABLES: False
TOPICS:
2.3 One-Dimensional Motion with Constant Acceleration
NOTES:
Revised item
DATE CREATED: 1/13/2014 1:32 PM
DATE MODIFIED: 12/16/2016 10:10 PM
56. Amanda is standing at the edge of a cliff. She throws a rock vertically upward at speed v0, while at the same time
throws a second rock vertically downward at the same speed. How long after the rock thrown downward hits the ground
does the rock thrown upwards hit?
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Page 19
Chapter 02
a. 2v0/g
b. v0/g
c.
d.
ANSWER:
a
POINTS:
1
DIFFICULTY:
3
QUESTION TYPE: Multiple Choice
HAS VARIABLES: False
TOPICS:
2.3 One-Dimensional Motion with Constant Acceleration
NOTES:
New item
DATE CREATED: 8/17/2016 10:17 PM
DATE MODIFIED: 8/17/2016 10:20 PM
57. A baseball player throws a ball straight up into the air. At a height of 3.00 m above the release point, the ball is
moving at 1.25 m/s. What was the ballโs initial speed?
a. 7.56 m/s
b. 7.77 m/s
c. 57.2 m/s
d. 60.4 m/s
ANSWER:
b
POINTS:
1
DIFFICULTY:
2
QUESTION TYPE: Multiple Choice
HAS VARIABLES: False
TOPICS:
2.3 One-Dimensional Motion with Constant Acceleration
NOTES:
New item
DATE CREATED: 8/17/2016 10:20 PM
DATE MODIFIED: 12/26/2016 7:13 PM
58. Starting from rest, a car accelerates down a straight road with constant acceleration a1 for a time t1, then the
acceleration is changed to a different constant value a2 for an additional time t2. The total elapsed time is t1 + t2. Can the
equations of kinematics be used to find the total distance traveled?
a. No, because this is not a case of constant acceleration.
b. Yes, use (a1 + a2)/2 as the average acceleration and the total time in the calculation.
c. Yes, use a1 + a2 as the acceleration and the average time (t1 + t2)/2 in the calculation.
d. Yes, break the problem up into 2 problems, one with the conditions for the first time interval and the other
with the conditions for the second time interval, noting that for the second time interval the initial velocity is
that from the end of the first time interval. When done, add the distances from each of the time intervals.
ANSWER:
d
POINTS:
1
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Page 20
Chapter 02
DIFFICULTY:
2
QUESTION TYPE: Multiple Choice
HAS VARIABLES: False
TOPICS:
2.3 One-Dimensional Motion with Constant Acceleration
DATE CREATED: 7/6/2016 4:38 PM
DATE MODIFIED: 7/6/2016 4:38 PM
59. A ball rolls down an incline, starting from rest. If the total time it takes to reach the end of the incline is T, how much
time has elapsed when it is halfway down the incline?
a. 0.5 T
b. 0.5 T
d. More information is needed.
ANSWER:
c
POINTS:
1
DIFFICULTY:
2
QUESTION TYPE: Multiple Choice
HAS VARIABLES: False
TOPICS:
2.3 One-Dimensional Motion with Constant Acceleration
DATE CREATED: 7/6/2016 4:38 PM
DATE MODIFIED: 7/6/2016 4:38 PM
60. An object is dropped from a height. Once it is moving, which of the following statements is true, at least at one point?
a. Its velocity is more than its acceleration.
b. Its velocity is less than its acceleration.
c. Its velocity is the same as its acceleration.
d. Its velocity is never equal to its acceleration.
ANSWER:
d
POINTS:
1
DIFFICULTY:
2
QUESTION TYPE: Multiple Choice
HAS VARIABLES: False
TOPICS:
2.4 Freely Falling Bodies
DATE CREATED: 1/13/2014 1:31 PM
DATE MODIFIED: 8/1/2016 4:50 PM
61. A rock is thrown straight down with an initial velocity of 14.3 m/s from a cliff. What is the rock’s displacement after
2.0 s? (Acceleration due to gravity is 9.80 m/s2.)
a. 81 m
b. 48 m
c. 38 m
d. 22 m
e. 31 m
ANSWER:
b
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Page 21
Chapter 02
POINTS:
1
DIFFICULTY:
2
QUESTION TYPE: Multiple Choice
HAS VARIABLES: True
TOPICS:
2.4 Freely-Falling Objects
DATE CREATED: 7/6/2016 4:38 PM
DATE MODIFIED: 1/7/2017 1:10 PM
62. A rock is thrown straight up with an initial velocity of 25.0 m/s. What maximum height will the rock reach before
starting to fall downward? (Take acceleration due to gravity as 9.80 m/s2.)
a. 39.9 m
b. 15.9 m
c. 63.8 m
d. 31.9 m
e. 47.8 m
ANSWER:
d
POINTS:
1
DIFFICULTY:
2
QUESTION TYPE: Multiple Choice
HAS VARIABLES: True
TOPICS:
2.4 Freely-Falling Objects
DATE CREATED: 7/6/2016 4:38 PM
DATE MODIFIED: 12/30/2016 1:17 AM
63. A rock is thrown straight up with an initial velocity of 17.6 m/s. What time interval elapses between the rock’s being
thrown and its return to the original launch point? (Acceleration due to gravity is 9.80 m/s2.)
a. 3.60 s
b. 1.80 s
c. 2.70 s
d. 3.06 s
e. 3.96 s
ANSWER:
a
POINTS:
1
DIFFICULTY:
2
QUESTION TYPE: Multiple Choice
HAS VARIABLES: True
TOPICS:
2.4 Freely-Falling Objects
DATE CREATED: 7/6/2016 4:38 PM
DATE MODIFIED: 1/7/2017 1:12 PM
64. Two objects of different mass are released simultaneously from the top of a 20-m tower and fall to the ground. If air
resistance is negligible, which statement best applies?
a. The greater mass hits the ground first.
b. Both objects hit the ground together.
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Page 22
Chapter 02
c. The smaller mass hits the ground first.
d. No conclusion can be made with the information given.
ANSWER:
b
POINTS:
1
DIFFICULTY:
2
QUESTION TYPE: Multiple Choice
HAS VARIABLES: False
TOPICS:
2.4 Freely-Falling Objects
DATE CREATED: 7/6/2016 4:38 PM
DATE MODIFIED: 7/6/2016 4:38 PM
65. A baseball catcher throws a ball vertically upward and catches it in the same spot when it returns to his mitt. At what
point in the ball’s path does it experience zero velocity and non-zero acceleration at the same time?
a. midway on the way up
b. at the top of its trajectory
c. the instant it leaves the catcher’s hand
d. the instant before it arrives in the catcher’s mitt
ANSWER:
b
POINTS:
1
DIFFICULTY:
1
QUESTION TYPE: Multiple Choice
HAS VARIABLES: False
TOPICS:
2.4 Freely-Falling Objects
DATE CREATED: 7/6/2016 4:38 PM
DATE MODIFIED: 7/6/2016 4:38 PM
66. A baseball is released at rest from the top of the Washington Monument. It hits the ground after falling for 5.85 s.
What was the height from which the ball was dropped? (g = 9.80 m/s2 and assume air resistance is negligible)
a. 1.88 ร 102 m
b. 1.68 ร 102 m
c. 1.38 ร 102 m
d. 3.36 ร 102 m
ANSWER:
b
POINTS:
1
DIFFICULTY:
2
QUESTION TYPE: Multiple Choice
HAS VARIABLES: True
TOPICS:
2.4 Freely-Falling Objects
DATE CREATED: 7/6/2016 4:38 PM
DATE MODIFIED: 12/30/2016 1:31 AM
67. A rock, released at rest from the top of a tower, hits the ground after 3.5 s. What is the speed of the rock as it hits the
ground? (g = 9.8 m/s2 and air resistance is negligible)
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Chapter 02
a. 34 m/s
b. 17 m/s
c. 44 m/s
d. 68 m/s
e. 24 m/s
ANSWER:
a
POINTS:
1
DIFFICULTY:
2
QUESTION TYPE: Multiple Choice
HAS VARIABLES: True
TOPICS:
2.4 Freely-Falling Objects
DATE CREATED: 7/6/2016 4:38 PM
DATE MODIFIED: 12/30/2016 1:32 AM
68. Omar throws a rock down with speed 12.5 m/s from the top of a tower. The rock hits the ground after 1.50 s. What is
the height of the tower? (air resistance is negligible)
a. 24.0 m
b. 21.0 m
c. 30.0 m
d. 54.0 m
e. 45.0 m
ANSWER:
c
POINTS:
1
DIFFICULTY:
2
QUESTION TYPE: Multiple Choice
HAS VARIABLES: True
TOPICS:
2.4 Freely-Falling Objects
DATE CREATED: 7/6/2016 4:38 PM
DATE MODIFIED: 12/30/2016 1:38 AM
69. Gwen releases a rock at rest from the top of a 40-m tower. If g = 9.8 m/s2 and air resistance is negligible, what is the
speed of the rock as it hits the ground?
a. 28 m/s
b. 14 m/s
c. 20 m/s
d. 40 m/s
e. 780 m/s
ANSWER:
a
POINTS:
1
DIFFICULTY:
2
QUESTION TYPE: Multiple Choice
HAS VARIABLES: True
TOPICS:
2.4 Freely-Falling Objects
DATE CREATED: 7/6/2016 4:38 PM
Copyright Cengage Learning. Powered by Cognero.
Page 24
Chapter 02
DATE MODIFIED: 12/30/2016 1:40 AM
70. John throws a rock down with speed 11 m/s from the top of a 25-m tower. If g = 9.8 m/s2 and air resistance is
negligible, what is the rock’s speed just as it hits the ground?
a. 19 m/s
b. 25 m/s
c. 610 m/s
d. 22 m/s
e. 12 m/s
ANSWER:
b
POINTS:
1
DIFFICULTY:
2
QUESTION TYPE: Multiple Choice
HAS VARIABLES: True
TOPICS:
2.4 Freely-Falling Objects
DATE CREATED: 7/6/2016 4:38 PM
DATE MODIFIED: 12/30/2016 1:41 AM
71. Human reaction time is usually about 0.18 s. If your lab partner holds a ruler between your finger and thumb and
releases it without warning, how far can you expect the ruler to fall before you catch it? The nearest value is
a. 32 cm.
b. 88 cm.
c. 1.6 cm.
d. 180 cm.
e. 16 cm.
ANSWER:
e
POINTS:
1
DIFFICULTY:
2
QUESTION TYPE: Multiple Choice
HAS VARIABLES: True
TOPICS:
2.4 Freely-Falling Objects
DATE CREATED: 7/6/2016 4:38 PM
DATE MODIFIED: 12/30/2016 1:46 AM
72. At the top of a cliff 100 m high, Raoul throws a rock upward with velocity 15.0 m/s. How much later should he drop a
second rock from rest so both rocks arrive simultaneously at the bottom of the cliff?
a. 8.08 s
b. 3.31 s
c. 5.02 s
d. 1.78 s
e. 0.89 s
ANSWER:
d
POINTS:
1
DIFFICULTY:
3
Copyright Cengage Learning. Powered by Cognero.
Page 25
Chapter 02
QUESTION TYPE: Multiple Choice
HAS VARIABLES: True
TOPICS:
2.4 Freely-Falling Objects
DATE CREATED: 7/6/2016 4:38 PM
DATE MODIFIED: 12/30/2016 1:49 AM
73. Maria throws two stones from the top edge of a building with a speed of 22 m/s. She throws one straight down and the
other straight up. The first one hits the street in a time t1. How much later is it before the second stone hits?
a. 5.5 s
b. 4.5 s
c. 3.5 s
d. 6.5 s
e. Not enough information is given to work this problem.
ANSWER:
b
POINTS:
1
DIFFICULTY:
3
QUESTION TYPE: Multiple Choice
HAS VARIABLES: True
TOPICS:
2.4 Freely-Falling Objects
DATE CREATED: 7/6/2016 4:38 PM
DATE MODIFIED: 12/30/2016 1:50 AM
74. Mt. Everest is more than 8 000 m high. How fast would an object be moving if it could free fall to sea level after being
released from an 8 000-m elevation? (Ignore air resistance.)
a. 396 m/s
b. 120 m/s
c. 1 200 m/s
d. 12 000 m/s
ANSWER:
a
POINTS:
1
DIFFICULTY:
2
QUESTION TYPE: Multiple Choice
HAS VARIABLES: False
TOPICS:
2.4 Freely-Falling Objects
DATE CREATED: 7/6/2016 4:38 PM
DATE MODIFIED: 12/24/2016 10:07 PM
75. A basketball player can jump 1.6 m off the hardwood floor. With what upward velocity did he leave the floor?
a. 5.8 m/s
b. 2.8 m/s
c. 5.4 m/s
d. 5.6 m/s
e. 11 m/s
ANSWER:
d
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Page 26
Chapter 02
POINTS:
1
DIFFICULTY:
2
QUESTION TYPE: Multiple Choice
HAS VARIABLES: True
TOPICS:
2.4 Freely-Falling Objects
DATE CREATED: 7/6/2016 4:38 PM
DATE MODIFIED: 12/30/2016 1:52 AM
76. A water rocket, launched from the ground, rises vertically with acceleration of 25 m/s2 for 2.0 s when it runs out of
“fuel.” Disregarding air resistance, how high will the rocket rise?
a. 305 m
b. 356 m
c. 178 m
d. 130 m
e. 50 m
ANSWER:
c
POINTS:
1
DIFFICULTY:
3
QUESTION TYPE: Multiple Choice
HAS VARIABLES: True
TOPICS:
2.4 Freely-Falling Objects
DATE CREATED: 7/6/2016 4:38 PM
DATE MODIFIED: 12/30/2016 1:53 AM
77. A parachutist jumps out of an airplane and accelerates with gravity to a maximum velocity of 68.6 m/s in 7.00
seconds. She then pulls the parachute cord and after a 4.00-second constant deceleration, descends at 10.5 m/s for 60.0
seconds, reaching the ground. From what height did the parachutist jump?
a. 1.03E+3 m
b. 7.88E+2 m
c. 1.19E+3 m
d. 1.66E+3 m
e. 1.43E+3 m
ANSWER:
a
POINTS:
1
DIFFICULTY:
3
QUESTION TYPE: Multiple Choice
HAS VARIABLES: True
TOPICS:
2.4 Freely-Falling Objects
DATE CREATED: 7/6/2016 4:38 PM
DATE MODIFIED: 12/29/2016 5:31 PM
78. A ball is thrown vertically upwards at 24.5 m/s. For its complete trip (up and back down to the starting position), its
average speed is
a. 18.4 m/s.
b. 12.3 m/s.
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Page 27
Chapter 02
c. 24.5 m/s.
d. 6.1 m/s.
e. not given.
ANSWER:
b
POINTS:
1
DIFFICULTY:
2
QUESTION TYPE: Multiple Choice
HAS VARIABLES: True
TOPICS:
2.4 Freely-Falling Objects
DATE CREATED: 7/6/2016 4:38 PM
DATE MODIFIED: 12/29/2016 5:50 PM
79. A ball of relatively low density is thrown upwards. Because of air resistance the acceleration while traveling upwards
is โ10.8 m/s2. On its trip downward the resistance is in the opposite direction, and the resulting acceleration is โ8.8 m/s2.
When the ball reaches the level from which it was thrown, how does its speed compare to that with which it was thrown?
a. It is greater than the original speed upward.
b. It is the same as the original speed upward.
c. It is less than the original speed upward.
d. Without knowing the original speed, this problem cannot be solved.
ANSWER:
c
POINTS:
1
DIFFICULTY:
2
QUESTION TYPE: Multiple Choice
HAS VARIABLES: False
TOPICS:
2.4 Freely-Falling Objects
DATE CREATED: 7/6/2016 4:38 PM
DATE MODIFIED: 7/6/2016 4:38 PM
Copyright Cengage Learning. Powered by Cognero.
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