Hiya. The problem i'm trying to solve is this:(adsbygoogle = window.adsbygoogle || []).push({});

- I have two cars, each with the same mass.
- Speed before Collision of Car1 = Xm/s
- Speed before Collision of Car2 = Ym/s

To solve the problem of what speeds the two cars have after an ELASTIC collision, i used simultaneous equations.

My process was:

- make a K.E equation
- Make a momentum equation
- Solve for V1, and then thus V2

From my workings, i seem to have found that if the masses of the two vehicles are equal, then in an elastic collision; the speeds afterwards of the two vehicles will just swap.

e.g.

- Both cars' mass = 2Kg
- Speed of Car1 before collision = +4m/s
- Speed of Car2 before collision = -2m/s
- Speed of Car1 after collision = -2m/s = Speed of Car2 before collision
- Speed of Car2 after collision = +4m/s = Speed of Car1 before collision

Will that be the same for all collisions where the mass is the same and the collision is elastic?

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# 2 Cars Colliding with same mass

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