A mass m moves in a circle on a smooth horizontal plane with velocity v₀ at a radius R₀. The mass is attached to a string which passes through a smooth hole in the plane as shown. The tension in the s

Question

A mass m moves in a circle on a smooth horizontal plane with velocity v₀ at a radius R₀. The mass is attached to a string which passes through a smooth hole in the plane as shown. The tension in the string is increased gradually and finally m moves in a circle of radius $\frac{R_0}{2}$ . The final value of the kinetic energy is

A

mv₀²

B

$\frac{1}{4}$ mv₀²

C

2 mv₀²

D

$\frac{1}{2}$ mv₀²

Accepted Answer

$ \frac{1}{4} $ mv₀²

Answer

mv₀²

Answer

2 mv₀²

Answer

$ \frac{1}{2} $ mv₀²

NEET 2015 Physics Circular Motion MCQ Question

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