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3 August, 15:02

50W of power is generated using 100J of work to move a box onto a shelf. How long did it take to move the box from the floor to the shelf?

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  1. 3 August, 15:26
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    Answer: time t = 2 seconds

    Explanation:

    Given that

    Power P = 50W

    Energy E = 100J

    How long did it take to move the box from the floor to the shelf? This implies time taken.

    Power is defined as the rate at which work is done. I. e

    P = W. D/t

    Where work done = energy

    50 = 100/t

    Make t the subject of formula

    t = 100/50

    t = 2 second
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