Question

A satellite of the earth is revolving in a circular orbit with a uniform speed $v$. If the gravitational force suddenly disappears, the satellite will

• A. Continue to move with velocity v along the original orbit
• B. Move with a velocity v, tangentially to the original orbit
• C. Fall down with increasing velocity
• D. Ultimately come to rest somewhere on the original orbit

Answer 1

Answer: (B)

For a satellite revolving in a circular orbit, gravitational force provides the necessary centripetal force. If the gravitational force suddenly disappears, the satellite will move with a velocity $v$, tangentially to the original orbit