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A ball collides head-on with another at ...

A ball collides head-on with another at rest having 3 times the mass of first with a velocity of `1 ms^(-1)`. If the coefficient of restitution is 0.8, then velocities of the two after the collision will be:

A

`- 0.35 ms^(-1)` and `0.45 ms^( 1)`

B

`- 0.45 ms^(-1)` and `0.35 ms^( 1)`

C

`- 0.35 ms^(-1)` and `-0.45 ms^( 1)`

D

`- 0.45 ms^(-1)` and `-0.35 ms^( 1)`

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The correct Answer is:
a
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