A car of mass 2000 kg is lifted up a distance of 30 m by a crane in 1 minute. A second crane does the same job in 2 minutes. What is the power supplied by each crane?
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mass of car = 20000 kg
force= 20000 kgf =2000N
distance = 30m
time taken by first crane= 1 min= 60s
tine taken by second crane = 2 min= 120s
Power supplied by first crane = (2000*30)/60
= 60000/60
=1000W
power supplied by second crane = 60000/120
=500W
force= 20000 kgf =2000N
distance = 30m
time taken by first crane= 1 min= 60s
tine taken by second crane = 2 min= 120s
Power supplied by first crane = (2000*30)/60
= 60000/60
=1000W
power supplied by second crane = 60000/120
=500W
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