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average power and mechanical advantage of pulleys

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1. Calculate the average power in kilowatts required to pull a car up a ramp if the amount of work is 250 kj over a period of 45 seconds.

2. Calculate the mechanical advantage of a group of pulleys used to raise an engine from a car. The engine is raised 1.2 m with the pulleys when 4.8 m of rope is pulled through the pulleys.

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Average power and mechanical advantage of pulleys are calculated.

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