Question

a boy whose mass 50kg climbs, with constant speed, a vertical rope 6m long in 10s. boy power output during the climbs is .​

Answer 1

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=tW=303000=100 W

Answer 2

Answer:

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