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The bob A of a pendulum released from 30° to the vertical hits another bob B of the same mass at rest on a table as shown in Fig. How high does the bob A rise after the collision? Neglect the size of the bobs and assume the collision to be elastic.
Asked by Abhay Last Modified
Answer 
In elastic collision the linear momentum is conserved .
linear momentum =mass x velocity =mv
here mass of A and B are same.
so if elastic collision occur then A bobs complete transfer it momentum on bobs B.their velocities interchanged
After collision A will come to rest and B moves with velocity of A.thus bob A would not rise after collision.
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