Define the term power.a boy of mass 45 kg climbs up 20 steps in 20 seconds .if each step is 25 cm high,calculate the power used in climbing (g=10m/square)
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Power is defined as the rate of doing work.
Now, m = 45 kg,
n = 20,
t = 20 s,
h = 0.25 x 20 = 5 m
P = W / t = mgh / t
= (45 x 10 x 5)/20
= 112.5 W
dasy31:
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thos is the solution
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