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1. An elevator weighing 2000kg is moving up with a constant speed of 2.5m/s.The frictional force opposing the motion is 4000N. Calculate the power delivered by the motor to the elevator?
ans is 15,000 Watt i think ..!! is it??
weight = 20000N
f= 4000N
net downward force=24000N
since body is moving with uniform speed, hence upward force = 24000N
power=F.v
power=24000*2.5
=60000W=60KW
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