How much power is needed to lift a 30kg load of bricks to a height of 20met in a building under conturection in 10sec.
Answers
Answer:
The cranes power could be pretty much anything you want it to be.
It does have to meet a certain average power requirement to make this lift, but that is a simple homework question in physics.
Now if you were to ask what the lowest power crane you could use to make the lift, there would be a definite answer, except for the fact cranes are designed with safety margins and must meet regulatory margins so you would have to state brand model and country/ state where it is operated to look up the specification of maximum safe operable power of the crane that was actually available for hire or purchase to do this lift.
Life lesson here. Physics is often the easy part of the problem.
Explanation:
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Answer:
Work = Force x Distance
Force = Mass X Gravity (Near earth approximation)
So
Work = 30kg x 9.8 m/s2 x 20m = 5880 joules