Question

A young boy of mass 40 kg runs up a stairs of steps in 25 second of the height of each step is 15 cm, calculate his power (take g =(10m)-2
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Answer 1

Answer:

Explanation:

power = work done/ time taken

work done = force X displacement

i.e mg x s = (40)(10) X (15) = 6000 J

Time given = 15 cm convert into meter = 15 X 10^-2 m

therefore ,

power = work done / time taken = 6000 J/  15 X 10^-2 m

i.e 900 J/M