moves in a circle on a smooth horizontal plane with velocity

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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 2/R0​​. The final value of the kinetic energy is
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Aug
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 2/R0​​. [...]
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Tags: A mass , at a radius , initial position and sense of revolution are indicated in the fig. y - projection of the radius vector of rotating particle P is : , m , moves in a circle on a smooth horizontal plane with velocity , the period of revolution , The radius of circle , V0​ ,