5
QuizMultiple Choice

Work and Power

Question 5 • 350CR Integrated Science

A 2.50 × 105 W motor is used for 26.4 s to pull a boat straight toward shore. How far does the boat move toward shore if a force of 4.20 × 104 N is applied by the motor?

Answer
A
157 m
B
1,590 m
C
1.11 × 106 m
D
6.60 × 106 m

Explanation

Power is work divided by time, and the work done by a force in the direction of motion is force times distance. Thus, d = Pt/F = (2.50 × 10⁵ W)(26.4 s)/(4.20 × 10⁴ N) ≈ 157 m, so the boat moves 157 m toward shore.

AI-written and checked against the verified answer.

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