You throw a 1 kg rock down a 5m-deep wishing well it hits


You throw a 1 kg rock down a 5m-deep wishing well. It hits the water with a velocity of 7.5 m/s. How much work did air resistance do? Express your answer as a negative number of Joules.

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Physics: You throw a 1 kg rock down a 5m-deep wishing well it hits
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