Question

a boy runs up through a height of 20 metre in 20 seconds if his mass is 50 kg what is his average power​

Answer 1

Answer:490W

Explanation:

m=50kg, h=20m, g=9.8m/s², t=20s

Power = mgh/t = 50*20*9.8/20 = 490W

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Answer 2

Answer:

We know that,

Power = work/time

Work = force x displacement

Force = mg = 500 N

Hence work equals 500 x 20 = 10, 000J

Power = 10,000/20 = 500W

Hope it helps.