A satellite is moved from a low circular orbit of radius to a higher circular orbit…

PHYSICS · Single correct · A Level · Physics · Fields and their consequences · Fields and their consequences

Problem

A satellite is moved from a low circular orbit of radius

r

to a higher circular orbit of radius

2r

about the same planet. Which statement best describes how its kinetic energy

K

and gravitational potential energy

U

change once it has settled into the new orbit? (a)

K

decreases to one-fourth its original value, and

U

becomes less negative. (b)

K

increases to twice its original value, and

U

becomes less negative. (c)

K

decreases to one-half its original value, and

U

becomes less negative. (d)

K

decreases to one-half its original value, and

U

becomes more negative.