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A weight lifter does a series of arm raises while holding a 3.00 weight. Her forearm (including the hand) starts out horizontal and pivots to a vertical position about her elbow. The mass of the lower arm plus hand is 5.00 , uniformly distributed along its 35.0- length.
A) With each arm raise, by how much does the center of mass of her forearm (including her hand and the weight) rise?
B) What is the change in its gravitational potential energy with each arm raise?
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