Question: What is the work done by a force of 15 N acting at an angle of 60 degrees to the direction of motion over a distance of 4 m?

Options:

1. 30 J
2. 60 J
3. 120 J
4. 15 J

Correct Answer: 60 J

Solution:

Work = F × d × cos(θ) = 15 N × 4 m × cos(60°) = 15 N × 4 m × 0.5 = 30 J.