Question

a boy of mass 40 kg run up a staircase of 15 step each each 15 centimetre hight in 10 second find the work done by him and his power​

Answer 1

Explanation:

mass=40

distance=15cm

time=10sec

power=F.V=m.a.v=40*-10*15/10

=-400*1.5

=-600

workdone =P/T=60J

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