A torque of 20.0 N·m is applied to a bolt. The bolt rotates through an angle of 180 degrees. The work done in turning the bolt is
A) 72.5 J.
B) 51.9 J.
C) 62.8 J.
D) 49.9 J.
E) 58.4 J.

Question

Quizplus · Accepted Answer

The work done in turning the bolt can be calculated using the formula:
work = torque x angle of rotation in radians
Since the torque is given in Newton-meters and the angle is given in degrees, we need to convert the angle to radians:
180 degrees = π radians/180 degrees = π/1 radians
So the work done is:
work = (20.0 N·m) x (π/1 radians) = 62.8 J
Therefore, the best choice is (C).

A Torque of 20