Two gliders move toward each other on a frictionless linear air track.
glider a has mass 0.50 kg. glider b has mass 0.30 kg.
glider a has a velocity of 2.0 m/s to the right.
glider b has a velocity of 2.0 m/s to the left.
after they collide, glider b moves away with a final velocity of 2.0 m/s to the right.

a) what is the final velocity of glider a?

b) how do the changes in momentum and velocity compare for the two gliders?