Question

A boy of mass 45 kg climbs a ladder 10 m high at a constant velocity in 20 sec . Calculate power used by him. ( g= 10 m/s2)​

Answer 1

Answer:

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Answer 2

Given

$m = 45kg \\ n = 20 \\ t = 20sec \\ h = 0.25 \times 20 = 5m \\ p = \frac{w}{t} = \frac{mgh}{t} = \frac{45 \times 10 \times 5}{20} = 112.5 0$