A helicopter, starting from rest, accelerates straight up from the roof of a hospital. The lifting force does work in raising the helicopter. An 740-kg helicopter rises from rest to a speed of 9.5 m/s in a time of 4.0 s. During this time it climbs to a height of 7.4 m. What is the average power generated by the lifting force?

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Q: Paraaadiip

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