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Q. A 1.80x10^2 kg piano is being lifted at a steady speed from ground level straight up to an apartment 18.00 m above the ground. The crane that is doing the lifting produces a steady power of 4x10^2 W. How much time does it take to lift piano?

Q. A basketball (m = 0.65kg) is dropped from rest. Just before striking floor, the magnitude of the basketball's momentum is 2.90 kg•m/s. At what height was the basketball dropped?

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