A satellite is held in orbit by a 2 000-N gravitational force.Each time the satellite completes an orbit of circumference 80 000 km,the work done on it by gravity is: A)1.6 ´ 10⁸ J. B)1.6 ´ 10¹¹ J. C)6.4 ´ 10¹¹ J. D)0.

Question

Quizplus · Accepted Answer

The work done by gravity on the satellite is zero because the force of gravity is perpendicular to the direction of motion of the satellite. Therefore, there is no displacement in the direction of the force, and no work is done.

A Satellite Is Held in Orbit by a 2 000-N