A man of mass 50kg runs up a flight of stairs having a rise of 5m, is 4s.

1.what is work done?

2.what is average power developed by man?

Given that,
Mass, m=50 kg
Height, h=5 m
Time, t= 4sec
1-Work done is given by
W=mgh
=50 x 10 x 5=2500 J
2-Power, P=W/ t
=2500/4=625 W

  • 11

w=PE(potential energy)

w=mgh

mgh=50x5x10

mgh=2500 j

p=w/t

p=2500/4

p= 625W

  • 3
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