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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?

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?

Grade:10

2 Answers

Anurag Rai
18 Points
9 years ago

ans is 15,000 Watt i think ..!! is it??

suru siva
12 Points
8 years ago

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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