26. The gravitational force between two objects is zero when their distance apart is:
a) Zero
b) Infinite
c) Equal to the speed of light
d) Unrelated to their distance apart
27. The gravitational force between two objects is maximum when their distance apart is:
a) Zero
b) Infinite
c) Equal to the speed of light
d) Unrelated to their distance apart
28. Which of the following is true about the weight of an object in free fall?
a) It is zero
b) It is negative
c) It is constant
d) It changes continuously
29. A satellite in a circular orbit around the Earth experiences:
a) No acceleration
b) Constant acceleration
c) Variable acceleration
d) Negative acceleration
30. The period of revolution of a satellite in a circular orbit depends on:
a) Its mass
b) The mass of the Earth
c) Both its mass and the mass of the Earth
d) None of the above
