A child sits in a wagon with a pile of rocks, each with a mass of 0.51 kg. If she can throw each rock with a speed of 10 m/s relative to the ground, how many rocks must she throw per minute to maintain a constant average speed against a 3.2 N force of friction? (Do not round off your answers.)
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A child sits in a wagon with a pile of rocks, each with a mass of 0.51 kg. If she can throw each roc...
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