Question Detail
Question
In Example 1, a boy pulls a 50 kg box with a force of 120 N at an angle of 30° over 5.0 m. How much work does he do on the box?
Correct Answer
Option C is the correct answer.
Detailed Explanation
Using W = (F cos θ) Δx, we have W = (120 N)(cos 30°)(5.0 m) = 120 × 0.866 × 5.0 ≈ 5.2 × 10² J.
Hint
Calculate F cos θ first, then multiply by distance.