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solve the question and show work A person throws a 0.50 kg rock vertically from rest and gives the rock an initial velocity of 15.0

solve the question and show work

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A person throws a 0.50 kg rock vertically from rest and gives the rock an initial velocity of 15.0 m/s. The arm swings a distance of 0.75 m (vertically) to achieve such a velocity. A) Find the force given to the rock B) How long will it take to the rock to return to its initial position? Be sure you draw a diagram

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