Two gliders move toward each other on a linear air track, which we assume is frictionless. glider a has a mass of 0.50 kg, and glider b has a mass of 0.30 kg; both gliders move with an initial speed of 2.0 m/s. after they collide, glider b moves away with a final velocity whose x component is +2.0 m/s. what is the final velocity of a? suppose glider b is initially moving to the left at 5.0 m/s when it runs into glider a, which is initially at rest. at what speed does glider a move away from the collision if glider b bounces back with a speed of 0.92 m/s?