A spaceship orbits the earth at a constant speed along a circular path. When an astronaut inside the spaceship releases an object, it does not move away from him. Which of the following is the most accurate reason for this?
(a) The astronaut and the object move along the same circular path due to the earth’s gravitational pull.
(b) An object moving in a circular path round the earth experiences no gravitational pull.
(c) The gravitational forces on the object due to the spaceship exactly balance the gravitational pull on it due to the earth.
(d) The gravitational pull on the object due to the earth is very weak at a large distance from the earth.
