4
lesson pretestMultiple Choice

Pretest

Question 4 • Physics I

How is power calculated?

Answer
A
divide work by time
B
multiply work and time
C
multiply force and displacement
D
divide force by displacement

Explanation

Power is the rate at which work is done, so calculate it by dividing work by the time taken: power = work ÷ time. Therefore, “divide work by time” is correct; multiplying force by displacement gives work, not power.

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