Question

A student who weighs 558 N climbs a stairway (vertical height of 3.3 m) in 29 s.

Answer 1

Work is defined as force x displacement in the direction of the force. In this case the force is 558 N and the displacement is 3.3 m, so the work is 3.3 m x 558 N = 1,841.4 joules.

Power is work per unit of time. 1,841.4 J /29 s = 63 W.

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