A Torque Of $20.0 \mathrm{~N} \cdot \mathrm{m}$ Is Applied to a Bolt

Multiple Choice

A torque of $20.0 \mathrm{~N} \cdot \mathrm{m}$ is applied to a bolt. The bolt rotates through an angle of 180 degrees. The work done in turning the bolt is

A) $49.9 \mathrm{~J}$ .
B) $62.8 \mathrm{~J}$ .
C) $72.5 \mathrm{~J}$ .
D) $51.9 \mathrm{~J}$ .
E) $58.4 \mathrm{~J}$