Calculate the power (in W) of an engine if it can perform 120 J of work in 3 seconds.
- A.360
- B.80
- C.180
- D.40
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Power is the rate of doing work, so power equals work divided by time. Here the work is 120 J and the time is 3 seconds, which gives 120 divided by 3, that is 40 watts.
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