A 0.155 kg glider is moving to the right on a frictionless, horizontal air track with a speed of 0.900 m/s. It has a head-on collision with a 0.308 kg glider that is moving to the left with a speed of 2.17 m/s. Suppose the collision is elastic.
Find the magnitude of the final velocity of the 0.155kg glider ___ m/s