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

Question

Savannah Cross

Physics

21 October, 21:01

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

+4

Answers (1)

Know the Answer?

Ruiz · 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.