Two balls collide headon on a table. The first ball has a mass of 0.50 kg and an initial velocity of 12.0 m/s. The second ball has a mass of 0.75 kg and an initial velocity of 16.0 m/s. After the collision, the first ball travels at a velocity of 21.6 m/s. What is the velocity of the second ball after the collision? Assume a perfectly elastic collision and no friction between the balls and the table.
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2 answers

When the balls are moving in opposite directions
v₁= {2m₂v₂₀ +(m₁m₂)v₁₀}/(m₁+m₂)
v₂={ 2m₁v₁₀  (m₂m₁)v₂₀}/(m₁+m₂) 👍
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answered by Elena 
6.4 m/s
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answered by Jake
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