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Question :
76. A 200-hp engine can deliver, in SI units, an : 2102114

76. A 200-hp engine can deliver, in SI units, an average power of ____. (1 hp = 746 W)

A. 200 W

B. 74 600 W

C. 149 000 W

D. 298 000 W

77. The area under the force vs. displacement curve represents:

A. area.

B. force.

C. work.

D. coefficient of static friction.

78. A force of 100 N is applied to a 50-kg mass in the direction of motion for a distance of 6.0 m and then the force is increased to 150 N for the next 4.0 m. For the 10 m of travel, how much work is done by the varying force?

A. 1 200 J

B. 1 500 J

C. 2 400 J

D. -1 500 J

79. The net force acting on a 6.0-kg object is given by *F** _{x}* = (10 -

*x*) N, where

*F*

*is in newtons and*

_{x}*x*is in meters. How much work is done on the object as it moves from

*x*= 0 to

*x*= 10 m?

A. 100 J

B. 75 J

C. 50 J

D. 25 J

80. The net force acting on a 12.6-kg object is given by *F** _{x}* = (20 -

*x*) N, where

*F*

*is in newtons and*

_{x}*x*is in meters. How much work is done on the object as it moves from

*x*= 0 to

*x*= 10 m?

A. 300 J

B. 200 J

C. 150 J

D. 100 J