Question

A 70 kg man moved up 25 step up in 40 seconds. Find his power, if each step is
18 cm high.​

Answer 1

Answer:

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Explanation:

Given that ,

A man whose mass is 50kg climbs up 30 steps of a stair in 30s

each step is 20 cm high

Height at 30 steps , h=30×0.2=6 m

Change in potential energy , =mgh=50×10×6=3000 J

So, Work done by the man , W=3000 J

Power used , P=

t

W

=

30

3000

=100 W

Answer 2

Explanation:

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