- #1
southernbelle
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Homework Statement
In an isolated system, cart1 (with mass = 1 kg and vi1 = 2) has a perfectly elastic collision with cart2 (with mass = 2 kg and vi2 = 0). Find the velocity of cart1 and the velocity of cart2 after the collision.
I have to solve this using kinetic energy and momentum equations.
Homework Equations
m1vi1 + m2vi2 = m1v1f + m2v2f
1/2m1vi12 + 1/2m2vi22 = 1/2m1v1f2 + 1/2m2v2f2
The Attempt at a Solution
I have gotten to this point:
2= V1F + 2V2F
4= V1F2 + 2V2F
but I cannot get the numbers to work out correctly.
Using another equation I know that V1f = 2/3 and V2f = 4/3
I am doing substitution wrong or something.
Please help!