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Q1. A good baseball pitcher can throw a baseball toward home plate at 91 miles per hour with a spin of 1789 revolutions per minute. How many revolutions does baseball make on its way to home plate? For simplicity, assume that the 60.0 ft path is a straight line.

Q2. A 150.0 kg hoop rolls along a horizontal floor so that the hoop's center of mass has a speed of 0.18 m/s. How much work has got to be done on the hoop to stop it?

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Category:- Physics
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