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