A small bead of mass m can move on a smooth circular wire (radius R) under the action of a force F =
directed (r = position of bead from P & K = constant) towards a point P within the circle at a distance R/2 from the centre. What should be the minimum velocity (in m/s) of bead at the point of the wire nearest the centre of force (P) so that bead will complete the circle (Take
= 8 unit)

Text Solution
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Ans. 8

Sol. 

K i +U i = K f +U f



,V = 8 m/s
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