Physics

Problem

Which of the following expressions gives the magnitude of the speed

v

of a satellite of negligible mass moving in a stable circular orbit of radius

r

around a planet of mass

M

? (

G

is the universal gravitational constant.) a)

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

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

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

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