Find the binding energy of a satellite of mass `m` in orbit of radius `r`, (R = radius of earth, g = acceleration due to gravity)

Options

A. `(mgR^(2))/(r)`
B. `-(mgR^(2))/(r)`
C. `(mgR^(2))/(2r)`
D. `-(mgR^(2))/(2r)`

Answer

c

Explanation

`BE=(GMm)/(2r)=(gR^(2)m)/(2r)`