Q .     A small mass attached to a string rotates on frictionless table top as shown. If the tension of the string is increased by pulling the string causing the radius of the circular motion to decrease by a factor of 2, the kinetic energy of the mass will

AIPMT 2011
A

Remain constant.

B

Increase by a factor of 2.

C

Increase by a factor of 4.

D

Decrease by a factor of 2.

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