Identify the correct expression for the speed of a small satellite of mass moving in…

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

Problem

Identify the correct expression for the speed

v

of a small satellite of mass

m

moving in a stable circular orbit of radius

r

around a planet of mass

M

. (a)

v=\sqrt{\dfrac{Gm}{r}}

(b)

v=\sqrt{\dfrac{2GM}{r}}

(c)

v=\sqrt{\dfrac{GM}{r}}

(d)

v=\sqrt{\dfrac{G(M+m)}{r}}