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Heres the problem I am working on

http://img91.imageshack.us/img91/1161/cartz0.jpg [Broken]

Im trying to figure the setup to find which car was going faster and how fast...

Would I set up the equation before the collision and after...the collision is perfectly plastic so

[tex]

m_{a}v_{a} + m_{b}v_{b} = (m_{a} + m_{b})v\prime

[/tex]

also since its perfectly plastic

[tex]

v\prime_{b} = v\prime_{a} = v\prime

[/tex]

http://img91.imageshack.us/img91/1161/cartz0.jpg [Broken]

Im trying to figure the setup to find which car was going faster and how fast...

Would I set up the equation before the collision and after...the collision is perfectly plastic so

[tex]

m_{a}v_{a} + m_{b}v_{b} = (m_{a} + m_{b})v\prime

[/tex]

also since its perfectly plastic

[tex]

v\prime_{b} = v\prime_{a} = v\prime

[/tex]

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