A satellite is held in orbit by a 3000-N gravitational force.Each time the satellite completes an orbit of circumference 80,000 km,the work done on it by gravity is: A) 2.4 × 10⁸ J B) 2.4 × 10¹¹ J C) 9.6 × 10¹¹ J D) 0

Question

Quizplus · Accepted Answer

The work done by gravity on a satellite moving in circular orbit is zero since the gravitational force is perpendicular to the direction of motion at every point of the orbit. Therefore, the correct answer is D) 0.

A Satellite Is Held in Orbit by a 3000-N Gravitational