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Okay, i have a problem here with 2 dimensional elastic collision between 2 balls with equal mass, they are both moving in differant directions before collision

what i know:

v

the slope of their movement, which can be converted to an angle with tan

the problem is all ive got so far is momentum conservation with

m

but of course we have 2 unknown variables here v

so how do i use slope or angle to get v1 or v2 and then the other is easy to solve for.

thanks

EDIT: could i use impulse (J = Ft) and use a really small number of time and we know that J = p

EDIT2: and where could i get the F in impulse from? cant really use newtons second law of F = ma here because then i would need to know the acceleration of what it hit was which is essentially what finding J does for me... so anyone know of a better method??

cruncher

what i know:

v

_{x}and v_{y}of both balls,the slope of their movement, which can be converted to an angle with tan

^{-1}xthe problem is all ive got so far is momentum conservation with

m

_{1}v_{1}+ m_{2}v_{2}= m_{1}v_{1}' + m_{2}v_{2}'but of course we have 2 unknown variables here v

_{1}' and v_{2}'so how do i use slope or angle to get v1 or v2 and then the other is easy to solve for.

thanks

EDIT: could i use impulse (J = Ft) and use a really small number of time and we know that J = p

_{2}- p_{1}EDIT2: and where could i get the F in impulse from? cant really use newtons second law of F = ma here because then i would need to know the acceleration of what it hit was which is essentially what finding J does for me... so anyone know of a better method??

cruncher

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