At what rate is a 60.0-kg boy using energy when he runs up a flight of stairs 10.0-m high, in 8.00 s?

Name: At what rate is a 60.0-kg boy using energy when he runs up a flight of stairs 10.0-m high, in 8.00 s?
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Quizplus · Accepted Answer

The energy used is equal to the gravitational potential energy gained, which is mgh = 60.0 kg * 9.8 m/s² * 10.0 m = 5880 J. The power, or rate of energy use, is energy divided by time, so 5880 J / 8.00 s = 735 W, which is approximately 736 W.

At What Rate Is a 60