A Force of 20 Pounds Stretches a Spring 11 Inches $\frac { 240 } { 11 } \mathrm { ft } - \mathrm { lb }$

Multiple Choice

A force of 20 pounds stretches a spring 11 inches in an exercise machine. Find the work done in stretching the spring 2 feet from its natural position.

A) $\frac { 240 } { 11 } \mathrm { ft } - \mathrm { lb }$
B) $\frac { 960 } { 11 } \mathrm { ft } - \mathrm { lb }$
C) $\frac { 66 } { 5 } \mathrm { ft } - \mathrm { lb }$
D) $\frac { 480 } { 11 } \mathrm { ft } - \mathrm { lb }$
E) $\frac { 33 } { 5 } \mathrm { ft } - \mathrm { lb }$