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21 March, 05:01

How much power is needed to lift the 200-N object to a height of 4 m in 4 s?

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  1. 21 March, 06:03
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    Answer: 2000 watts

    Explanation:

    Given that,

    power = ?

    Weight of object = 200-N

    height = 4 m

    Time = 4 s

    Power is the rate of work done per unit time i. e Power is simply obtained by dividing work by time. Its unit is watts.

    i. e Power = work / time

    (since work = force x distance, and weight is the force acting on the object due to gravity)

    Then, Power = (weight x distance) / time

    Power = (200N x 4m) / 4s

    Power = 8000Nm / 4s

    Power = 2000 watts

    Thus, 2000 watts of power is needed to lift the object.
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