A weightlifter raises a 200-kg barbell through a height of 2 m in 2.2 s. the average power he develops during the lift is

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Physics

Mora

6 August, 01:45

A weightlifter raises a 200-kg barbell through a height of 2 m in 2.2 s. the average power he develops during the lift is

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Kirk · Answer 1

Power is calculated as work per unit time, and work in turn is calculated as force multiplied by distance. In this case, the force required is equivalent to the weight of the barbell multiplied by acceleration due to gravity.

P = W/t = Fd/t = mgd/t = (200 kg) (9.81 m/s^2) (2 m) / 2.2 s = 1783.64 Watts.