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A helicopter, starting from rest, accelerates straight up from the roof of a hospital. The lifting force does work in raising the helicopter. An 880-kg

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A helicopter, starting from rest, accelerates straight up from the roof of a hospital. The lifting force does work in raising the helicopter. An 880-kg helicopter rises from rest to a speed of 7.0 m/s in a time of 3.0s. During this time it climbs to a height of 7.5 m. What is the average power generated by the lifting force

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