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A 2-kg ball is tied to the end of a 5m long massless cord that you're holding. You spin the ball around at such a

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A 2-kg ball is tied to the end of a 5m long massless cord that you're holding. You spin the ball around at such a speed that it moves in a perfect horizontal circle at constant speed with the cord making a 45" angle. How long does it take to complete 1 full rotation

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