*13-72. The ball has a mass of 30 kg and a speed v = 4 m/s
Chapter 13, Problem 13-72(choose chapter or problem)
*13-72. The ball has a mass of 30 kg and a speed v = 4 m/s at the instant it is at its lowest point. 0 = 0. Determine the tension in the cord and the rate at which the balls speed is decreasing at the instant 0 = 20. Neglect the size of the ball.
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