# Air Glider Elastic Collision

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1. Mar 1, 2015

1. The problem statement, all variables and given/known data
A 0.159kg glider is moving to the right on a frictionless, horizontal air track with a speed of 0.870m/s . It has a head-on collision with a 0.310kg glider that is moving to the left with a speed of 2.15m/s . Suppose the collision is elastic.

a) Find the magnitude of the final velocity of the 0.159kg glider.

b) Find the magnitude of the final velocity of the 0.310kg glider.

2. Relevant equations

3. The attempt at a solution
I know that both the kinetic energy and the momentum is preserved, and I have "constructed" both the equations, but I can't get the right answer!

Here are my previous answers (which were wrong):
Part A:
2.1752
1.7161
1.1262
0.4295

Part B:
0.5899
0.4295
0.2

Thanks!

2. Mar 1, 2015

### Staff: Mentor

Show how you set up the equations and how you solved them.

Don't just give a list of answers. Show how you got them. That way we can see where you are going wrong.