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25 August, 15:07

A crane with output power of 200W will lift a 600N object a vertical distance of 4.0 meters in seconds

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  1. 25 August, 15:11
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    Power is calculated by dividing energy with time (J/s) or Watts

    In this case, The energy is given by mgh where mg is the weight and h is the vertical height.

    Thus, Energy = 600 * 4 = 2400 Joules

    Power = Energy / time

    Time will therefore be Energy/power

    = 2400 J / 200

    = 12 seconds
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