Question: Which of the following statements is true for a satellite in a stable orbit?

Options:

1. It requires continuous propulsion.
2. It moves in a straight line.
3. It is acted upon by gravitational force.
4. It has zero velocity.

Correct Answer: It is acted upon by gravitational force.

Solution:

A satellite in a stable orbit is acted upon by gravitational force, which provides the necessary centripetal force to keep it in orbit.