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19 August, 03:07

If it took you 5 seconds to move a rock 15 meters using a force of 150 Newtons, how much power did

you need to use?

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Answers (1)
  1. 19 August, 04:55
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    Answer: 450 watts

    Explanation:

    Given that:

    Time taken = 5 seconds

    Distance = 15 meters

    Force = 150 Newtons

    Power = ?

    Recall that power is the rate of work done per unit time

    i. e Power = work / time

    (since work is a product of force and distance, then

    power = (force x distance) / time

    Power = (150 Newtons x 15 m) / 5 s

    Power = 2250 / 5

    Power = 450 watts

    Thus, you need to use 450 watts
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