Question

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

• A. continue to move with the same velocity in the same orbit
• B. move tangentially to the original orbit with velocity $V$
• C. fall down with increasing velocity
• D. come to a stop somewhere in its original orbit

Answer 1

The correct option is B move tangentially to the original orbit with velocity $V$

Under the action of a gravitational force, satellite traces the circular path. At each point on the path, the velocity is always directed tangentially to the orbit. As the force disappears, there will be no center seeking force. So satellite will travel along the tangential direction.