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Help please. Thank you!! 1. A ball of mass M. moving horizontally at 5.0 m/s, collides elastically with a block of mass 3M that is

Help please. Thank you!!

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1. A ball of mass M. moving horizontally at 5.0 m/s, collides elastically with a block of mass 3M that is initially hanging at rest from the ceiling on the end of a 50.0 cm string. Find the maximum angle through which the block swings after it is hit. (10 pts) 5 m/s >

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