How is the power related to the speed at which a body can be lifted? How many kilograms willa man working with the power of 100 W, be able to lift at constant speed of 1 ms^-l vertically?
(g = 10 ms-^2
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Power = work/time
work=force x displacement
force = mass x acceleration
acceleration=velocity/time
Therefore,
Power=(velocity)*(mass)*(displacement) ÷ (time)*(time)
In the question
power,P=100W
velocity,v=1m/s
since time,t=1s
displacement, s=1m
acceleration,a=10m/s (acceleration to overcome gravity)
we have to find mass m
P=m×a×s÷t
100=m×10
m=10
hope this may help you..
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