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Two identical balls A and B each of mass...

Two identical balls A and B each of mass 2kg and radius R, are suspended vertically from an inextensible strings as shown in fig. Third ball C of mass 1 kg and radius `r = (sqrt(2) - 1)R` falls and hits A and B symmetrically with 10m/s. Speed of both A and B just after the collision is 3m//s.
The value of coefficient of restitution is

A

`(1)/(4)`

B

`(1)/(sqrt(2))`

C

`sqrt(2)-1`

D

`(1)/(2)`

Text Solution

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The correct Answer is:
C
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