The iron ball shown is being swung in a vertical circle at theend of a 0.7-m str

Question

The iron ball shown is being swung in a vertical circle at theend of a 0.7-m string. How slowly, in m/s, can the ball go throughits top position without having the string go slack? My choices are: 1.3 m/s 2.6 m/s 3.9 m/s 6.9 m/s 9.8 m/s When you respond, please include how you arrived at an answer.This would help me a lot. The iron ball shown is being swung in a vertical circle at theend of a 0.7-m string. How slowly, in m/s, can the ball go throughits top position without having the string go slack? My choices are: 1.3 m/s 2.6 m/s 3.9 m/s 6.9 m/s 9.8 m/s When you respond, please include how you arrived at an answer.This would help me a lot.

Explanation / Answer

Formula for calculating the value of the speed of the ball atthe top point of vertical circle is                         v = (gr)                            = [(9.80m/s2)(0.7m)]                            = 2.62 m/s

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