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Michelle swings a 0.009-kg rubber stopper around her head. The rubber stopper is tied to a string that Michelle holds at 0.72 m while swinging it once every 0.5s. What is the minimum force she needs...

A compact car, mass 825 kg, moving south at 15 m/s, is struck by a full-sized car, mass 1588 kg, moving east at 12 m/s. The two cars stick together, and momentum is conserved in the collision. A.Find...

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