conserve momentum.
0.68x*8.30 - 1.32*8.85 = -0.68*6.28 +1.32v
A 0.68 kg ball traveling at 8.30 m/s collides head-on with a 1.32 kg ball moving in the opposite direction at a velocity of -8.85 m/s. The first ball moves away at -6.28 m/s after the collision. Find the velocity of the second ball.
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