1.

A smooth sphere of radius R is fixed on a horizontal surface. A steel, moving horizontally with velocity v_(0)=5sqrt(gR), collides with the sphere, changes its direction and moves with velocity v as shown. Then

Answer»

`4sqrt(2)v_(0)=5sqrt(3)V`
`8v_(0)=5sqrt(3)v`
`5v_(0)=8sqrt(3)v`
`v=v_(0)`

ANSWER :B


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