How much power is needed to lift the 200-N object to a height of 10 m in 4 s?

Question

How much power is needed to lift the 200-N object to a height of 10 m in 4 s?

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Khải Quang 2 months 2021-07-23T02:07:54+00:00 1 Answers 4 views 0

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    2021-07-23T02:09:34+00:00

    Answer:

    500 watts

    Explanation:

    Recall that the definition of power is the amount of energy delivered per unit of time.

    In our case, the energy delivered is potential energy which we can estimate as the product of the weight of the object times the distance it is lifted above ground:

    200 N x 10 m = 2000  Nm

    then the power is the quotient of this potential energy divided the time it took to lift the object to that position:

    Power = 2000 / 4   Nm/s = 500 Nm/s = 500 watts

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