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A point mass is tied to one end of a cor...

A point mass is tied to one end of a cord whose other end passes through a vertical hollow tube , caught in one hand. The point mass is being rotated in a horizontal circle ofradius 2 m with speed of 4m/sec.The cord is then pulled down so that the radius of the circle reduces to 1m . Compute the new linear and angular velocities of the point mass and compute the kinetic energies under the initial and final states.

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