State the correct expression for the speed of a satellite moving in a circular orbit…

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

Problem

State the correct expression for the speed

v

of a satellite moving in a 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{g\,r}

(d)

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