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Elastic Collision of Air-Track Glider

An air-track glider with an initial speed of 4.0 m/s has a head-on collision with another glider at rest that is three times as massive. What are the final speed and directions of the gliders if the collision is elastic? I believe the answer is V1 = -2.0 m/s and V2 = +2.0 m/s. I need to see each step and formula to solve this question.

Solution Summary

This solution calculates the final speed and direction of the glider by taking into account the conservation of momentum during an elastic collision, whereby initial momentum and final momentum are equal.