A satellite is transferred from a circular orbit of radius to a lower circular orbit…
PHYSICS · Subjective · A Level · Physics · Fields and their consequences · Fields and their consequences
Problem
A satellite is transferred from a circular orbit of radius 4RE to a lower circular orbit of radius 2RE around Earth (RE is Earth’s radius).
Is the work done by an external agent on the satellite during this transfer positive, negative or zero? Give a brief reason (one sentence).