A lift is designed to carry a load of 2000 kg through 5 floors of a building, averaging 6 m per floor, in 10 s. Calculate the power of the lift.
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force = 2,000×10
=20,000N
distance = 5 × 6 = 30m
time = 10 s
∴ work done = 20,000×30
= 600,000 joules
∴power = 600,000/10
= 60,000 j/s
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