Question

A man weighing 500 N runs up a staircase in 5 s. He rises up at 3.75m. 1. What work did he do. 2. What was his power?

Answer 1

1 ) Work = Force * Displacement

W = f * d

W = 500 * 3.75

W = 1875 Nm. or. 1875 J

2 ) Power = Work / Time

P = W / t

P = 1875 / 5

P = 375 Nm / s. or. 375 J / s.

P = 375 W

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