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22 March, 06:08

Jill can use a force of 12N to lift a single box up 5m. How many of these boxes must she lift in a minute to use 60 watts of power?

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  1. 22 March, 06:25
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    Answer: 60 of the boxes

    Explanation:

    Work is said to be done if force is applied to move a body over a distance.

    Work done = Force * distance

    Workdone by Jill to move a box = 12*5 = 60Joules

    Power is the rate of workdone in a specific time. It is measured in Joules/sec

    Power = Work done/Time

    60=60/time

    Time = 60/60

    Time=1 second

    This means that it took Jill 1second to move a box.

    If it takes 1second to move a box using a power of 60watts, this means Jill will move 60boxes in a minute (60seconds) using the same power.
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