A small both A of mass m is attached to a massless rigid rod of length 1 m pivoted at point P and kept at an angle of 
with vertical as shown in figure. At distance of 1 m below point P , an identical bob B is kept at rest on a smooth horizontal surface that extends to a circular track of radius R as shown in figure. If bob B just manages to complete the circular path of radius R upto a point Q after being hit elastically by bob A , then radius R is 
m.
Text Solution
Verified by ExpertsB
at lowest point
After collision velocity of B becomes,
(Same mass)
Now to complete circular motion
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