Question: A small mass attached to a string rotates on frictionless table top as shown. If the tension in the string is increased by pulling

A small mass attached to a string rotates on frictionless table top

A small mass attached to a string rotates on frictionless table top as shown. If the tension in 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 (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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