A Satellite Revolves Around the Earth in a Circular Orbit $-10^{12}$

Multiple Choice

A satellite revolves around the Earth in a circular orbit with a mechanical energy of $-10^{12}$ J. What is its kinetic energy?

A) $-5 \times 10^{11} \mathrm{~J}$
B) $+5 \times 10^{11} \mathrm{~J}$
C) $+10 \times 10^{11} \mathrm{~J}$
D) $-20 \times 10^{11} \mathrm{~J}$
E) $+7.1 \times 10^{11} \mathrm{~J}$