3
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Question 3 • Physics I

A load of bricks is lifted to the second floor of a building. How do work and power relate to this job?

Answer
A
The faster the job is done, the greater the power.
B
The less work is done, the more power is needed.
C
The longer the job takes, the more work is done.
D
The greater the power applied, the more work is done.

Explanation

Power is the rate at which work is done: power = work ÷ time. Lifting the same load to the same floor requires the same amount of work, so doing it in less time means greater power. Thus, “The faster the job is done, the greater the power” is correct.

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