A lift is designed to carry a load of 4000 kg through 10 floors of a building averaging 6 m per floor in 10 seconds. calculate the horse power of the lift.
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Height => 10 * 6 => 60m
Mass => 4000kg and let g = 10m/s^2
Therefore , force => mg => 4000*10=> 400000N
So, work done => force * displacement
=> 40000*60 => 2400000J
Time taken => 10 sec
Therefore power => 2400000/10 => 240000W
Therefore horse power => 240000/746
=> 321.7 J
Mass => 4000kg and let g = 10m/s^2
Therefore , force => mg => 4000*10=> 400000N
So, work done => force * displacement
=> 40000*60 => 2400000J
Time taken => 10 sec
Therefore power => 2400000/10 => 240000W
Therefore horse power => 240000/746
=> 321.7 J
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