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17 December, 11:50

A powered winch is used to pull a sailboat to shore. The winch uses a 900 W motor. If the motor is used for 30 s, how much work does it do? (Power: P = W/t)

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  1. 17 December, 12:07
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    The given formula for Power is = P: W/t. But the problem is looking the work and the given numbers were power and time, that's why you need to rearrange the equation into W = P (t). The power is 900 Watts and the time is 30 s. You just need to substitute the following values to the appropriate position and you should be able to get 27,000 Joules or 27 kJ.
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