Question: What is the work done by a torque of 15 N·m that rotates an object through an angle of 60 degrees?

Options:

1. 15 J
2. 30 J
3. 45 J
4. 60 J

Correct Answer: 30 J

Solution:

Work done W = τθ, where θ = 60 degrees = π/3 radians. Thus, W = 15 N·m * π/3 = 15 * 1.047 = 15.71 J.