Finding out the speed of the ball after the collision


A 120 ball moving to the right at 4.0 catches up and collides with the 430 ball which is moving to the right at 1.2.

i) When the collision is perfectly elastic, find out the speed of the 120 ball after the collision?

ii) When the collision is perfectly elastic, find out the speed of the 430 ball after the collision?

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Physics: Finding out the speed of the ball after the collision
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