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11 March, 00:09

A force of 110 N is applied horizontally to the handles of a lawnmower to move it at a speed of 0.80 m/s across a lawn. Find the power used to mow the lawn.

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  1. 11 March, 00:39
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    Power is the rate of doing work, P = W/t. As is implied by the equation for power, a unit of power is equivalent to a unit of work divided by a unit of time. We calculate as follows:

    P = W/t = Fd/t where d/t = v

    P = Fv = 110 (80)

    power is 8800 watts
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