Question

A 50 kg girl runs up the stairs to a floor 6m higher in 10 s. What is her power output?
P=f.dt
P=(50kg x 10m/s2 x6m)
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10
= 300J/s or 300 watts

Answer 1

Correct.

Answer 2

P=W/t
=(Fscos theta)/t
=Fvcos theta