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The Iron Ball Shown Is Being Swung in a Vertical

question 31

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The iron ball shown is being swung in a vertical circle at the end of a 0.7-m string. How slowly, in ft/s, can the ball go through its top position without having the string go slack? The iron ball shown is being swung in a vertical circle at the end of a 0.7-m string. How slowly, in ft/s, can the ball go through its top position without having the string go slack?   A)  1.3 m/s B)  2.6 m/s C)  3.9 m/s D)  6.9 m/s E)  9.8 m/s


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