An artificial satellite moving in a circular orbit around the earth has a total (kinetic + potential) energy `E_(0)`. Its potential energy and kinetic energy respectively are

Options

A. `2E_(0) and -2E_(0)`
B. `-2E_(0) and E_(0)`
C. `2E_(0) and -E_(0)`
D. `-2E_(0) and -E_(0)`

Answer

C

Explanation

`because` Total energy, `E_(0)=-(GMm)/(2r)`
Potential energy, `U=-(GMm)/(r)=2E_(0)`
Kinetic energy, `K=+(GMm)/(2r)=-E_(0)`.