Posted by help on .
An 67.6 kg object moving to the right at
38.7 cm/s overtakes and collides elastically with a second 48.9 kg object moving in the same direction at 19.2 cm/s.
Find the velocity of the second object after the collision.
Answer in units of cm/s

Physics 
Elena,
v₁= {+2m₂v₂₀ +(m₁m₂)v₁₀}/(m₁+m₂)
v₂={ 2m₁v₁₀ + (m₂m₁)v₂₀}/(m₁+m₂)