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Question 1 A 0.400 m long string that has a ball attached to it is spinning around on a flat horizontal plane. It spins over a 177 angle in 0.690 s. What is the centripetal acceleration of the ball if it is in uniform circular motion? 50.1 m/s2 2.63x104 m/s2 8.02 m/s2 13.0 m/s2 Question 2