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) .

Question

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) .

Quizplus · Accepted Answer

The Answer of 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) .

A Body of Mass M Is Whirled at a Constant