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a 195-g ball traveling 4.50 m/s to the right collides with a 125-g ball traveling 12.0...

a 195-g ball traveling 4.50 m/s to the right collides with a 125-g ball traveling 12.0 m/s to the left. after the collision, the heavier ball is traveling 8.40 m/s to the left. what is the velocity of the lighter ball after the collision?

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Answer #1

by the conservation of momentum

initial momentum = final momentum

0.195 * 4.5 + 0.125 * (-12) = 0.195 * (-8.4) + 0.125 * v

v = 8.124 m/s

velocity of the lighter ball after the collision = 8.124 m/s

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