A Lunar Module Weighs 16 Tons on the Surface of Earth

Multiple Choice

A lunar module weighs 16 tons on the surface of Earth. How much work is done in propelling the module from the surface of the moon to a height of 50 miles? Consider the radius of The moon to be 1100 miles and its force of gravity to be one-sixth that of Earth.

A) $1.35 \times 10 ^ { 12 } \mathrm { ft } - \mathrm { lb }$
B) $1.35 \times 10 ^ { 9 } \mathrm { ft } - \mathrm { lb }$
C) $6.73 \times 10 ^ { 8 } \mathrm { ft } - \mathrm { lb }$
D) $4.09 \times 10 ^ { 9 } \mathrm { ft } - \mathrm { lb }$
E) $4.09 \times 10 ^ { 12 } \mathrm { ft } - \mathrm { lb }$