A Ball of Mass M Is Attached to a Thin

question 46

Multiple Choice

A ball of mass m is attached to a thin string and whirled in a vertical circle or radius r. The tension in the string at point e where the ball is moving with speed v is

• A) mg
• B) mg - mv²/r
• C) mg + mv²/r
• D) mv²/r
• E) none of the above.

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