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QAIPM-2015-Ph-1323: NEET 2015 Physics - Class 11 AIPM-2015-Ph-1323 Solution: A mass m moves in a circle on a smooth horizontal plane with…

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

. The final value of the kinetic energy is

2mv_0^2

\frac{1}{2}mv_0^2

mv_0^2

\frac{1}{4}mv_0^2

Multiple Choice Options

A 2mv $_0^2$ 0 2 _
B ${1 \over 2}$ 2 1 _ mv $_0^2$ 0 2 _
C mv $_0^2$ 0 2 _
D ${1 \over 4}$ 4 1 _ mv $_0^2$ 0 2 _

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