The Iron Ball Shown Is Being Swung in a Vertical

question 31

Multiple Choice

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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