A man of mass 50kg ascends 30 steps of a staircase in 15 seconds.If the height of each step of the staircase is 20cm, find the power of man (g = 9.8 m/s²).
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Answered by
2
Answer:
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
Answered by
1
Answer:
distance=30×20=600cm
=6m
m=50kg
t=15s
p=w/t
=m×s/t
=50×6/15
=20watt
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