31. The centripetal force required to keep a satellite in a circular orbit is provided by:
a) The gravitational force
b) The electromagnetic force
c) The weak nuclear force
d) The strong nuclear force
32. The force of gravity between two objects is proportional to the:
a) Square of their masses
b) Square root of their masses
c) Cube of their masses
d) Cube root of their masses
33. Which of the following is true about gravitational potential energy?
a) It depends on the mass of the object
b) It depends on the height of the object
c) It depends on both the mass and height of the object
d) It does not exist
34. The gravitational potential energy of an object is maximum when its height is:
a) Zero
b) Maximum
c) Minimum
d) Unrelated to its height
35. The gravitational potential energy of an object is zero when its height is:
a) Zero
b) Maximum
c) Minimum
d) Unrelated to its height
