Elastic collision

  • Thread starter shamockey
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  • #1
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A proton, moving with a velocity of v1i collides elastically with another proton that is initially at rest. One proton has three times the speed of the other after the collision. How would I find the speed of each proton after the collision in terms of vi and their velocity vectors after the collision?

I understand that momentum is conserved, but i see how to apply it.

Any help would greatly be appreciated.
 

Answers and Replies

  • #2
dextercioby
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Well,then yes,u must use both momentum conservation (in vector form !) and conservation of KE (since u don't have the #-s you can assume for simplicity non-relativistic case)...

That would be all.Just choose 2 orthonormal axis and simple algebra to find what u want.

Daniel.
 

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