A satellite is held in orbit by a 1 000-N gravitational force.Each time the satellite completes an orbit of circumference 80 000 km,the work done on it by gravity is: A)1.0×10⁸ J. B)8.0×10⁸ J. C)1.0×10¹¹ J. D)0. E)8.0×10¹¹ J.

Question

Quizplus · Accepted Answer

The work done by gravity on the satellite in a complete orbit is zero because the gravitational force is acting perpendicular to the direction of motion of the satellite. Therefore, the correct choice is D, 0.

A Satellite Is Held in Orbit by a 1 000-N