A Body of Mass M Is Whirled at a Constant

question 58

Multiple Choice

A body of mass m is whirled at a constant angular velocity on the end of a string of length R. To double the kinetic energy of the body as it whirls while maintaining the angular velocity, the length of the string must be changed to

• A) 2R.
• B) .
• C) R/2.
• D) 4R.
• E) .

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