The Iron Ball Shown Is Being Swung in a Vertical

question 9

Multiple Choice

The iron ball shown is being swung in a vertical circle at the end of a 0.7-m string.How slowly 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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