Physics

Problem

Which expression gives the total mechanical energy

E_{\text{tot}}

of a satellite of mass

m

moving in a stable circular orbit of radius

r

around a planet of mass

M

? a)

E_{\text{tot}}=-\dfrac{G M m}{r}

E_{\text{tot}}=\dfrac{G M m}{2r}

E_{\text{tot}}=-\dfrac{G M m}{2r}

E_{\text{tot}}=-\dfrac{G M m}{4r}