A car of 2000 kg lifted up a distance 30m by a crane in 2min what is the power supplied by a crane
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Mass, m = 2000kg
Distance, d = 30 m
Time, t = 1 min
= 60 sec
second crane does the same job in 2 min = 120 sec
Work done = Force x displacement
Force = m x g
so, Work done = m x g x h
= 2000 x 10 x 30
= 600000 J
Power = work done / time
= 600000/60
= 10000 watt
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