#
Question :
51. You facing east looking at the clock the wall. : 2102143

51. You are facing east looking at the clock on the wall. You see the second hand moving clockwise (of course). In what direction is the angular velocity vector for this second hand?

A. east

B. west

C. north or south, but not east or west

D. For half the rotation it is east, and for the other half of the rotation it is west.

52. An object of mass 0.50 kg is transported to the surface of Planet X where the object's weight is measured to be 20 N. The radius of the planet is 4.0 ´ 10^{6} m. What is the mass of Planet X? (*G* = 6.67 ´ 10^{-11} N ? m^{2}/kg^{2})

A. 13 ´ 10^{19 }kg

B. 17 ´ 10^{22} kg

C. 9.6 ´ 10^{24} kg

D. 21 ´ 10^{25 }kg

53. An object of mass 0.50 kg is transported to the surface of Planet X where the object's weight is measured to be 20 N. The radius of the planet is 4.0 ´ 10^{6} m. What free fall acceleration will the 0.50-kg object experience when at the surface of Planet X?

A. 48 m/s^{2}

B. 20 m/s^{2}

C. 16 m/s^{2}

D. 40 m/s^{2}

54. An object of mass 0.50 kg is transported to the surface of Planet X where the object's weight is measured to be 20 N. The radius of the planet is 4.0 ´ 10^{6} m. What free fall acceleration will the 0.50-kg object experience when transported to a distance of 2.0 ´ 10^{6} m from the surface of this planet?

A. 90 m/s^{2}

B. 20 m/s^{2}

C. 13 m/s^{2}

D. 18 m/s^{2}

55. An Earth satellite is orbiting at a distance from the Earth's surface equal to one Earth radius (4 000 miles). At this location, the acceleration due to gravity is what factor times the value of *g* at the Earth's surface?

A. There is no acceleration since the satellite is in orbit.

B. 2

C. 1/2

D. 1/4