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Two smooth balls A and B, each of mass m...

Two smooth balls A and B, each of mass m and radius R, have their centre at (0,0,R) and (5R,-R,R) respectively, in a coordinate system as shown. Ball A, moving along positive x-axis, collides with ball B. Just before the collision, speed of ball A is 4m/s and ball B is stationary. The collision between the balls is elastic. Velocity of the ball A just after the collsion is

A. `(hati+sqrt3hatj)m//s`
B. `(hati-sqrt3hatj)m//s`
C. `(2hat(i) + sqrt3hat(j)) m//s`
D. `(2hati+2hatj)m//s`

A

`(hat(i) + sqrt(3)hat(j)) m//s`

B

`(hat(i) - sqrt(3)hat(j)) m//s`

C

`(2hat(i) + sqrt(3)hat(j)) m//s`

D

`(2hat(i) + sqrt(2)hat(j)) m//s`

Text Solution

Verified by Experts

The correct Answer is:
A
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