A mass m moves in a circle on a smoothhorizontal plane with velocity vo at a radius Ro Themass is attached to a string which passes througha smooth hole in the plane as shown.The tension in the string is increased gradually andfinally m moves in a circle of radius The finalvalue of the kinetic energy is \lbrack AIPMT-2015\rbrack2

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Q. A mass

m

moves in a circle on a smooth horizontal plane with velocity

v_{0}

at a radius

R_{0}

. 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

R_{0} / 2

. Then, the final value of the kinetic energy of particle is

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 :

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