Hi guys, first time poster whose not sure if he's in the right forum, but here goes.(adsbygoogle = window.adsbygoogle || []).push({});

I have a question that reads:

A body, A, of mas 4kg moves with a velocity of 2ms-1 and collides head-on with another body, B, of mass 3kg moving in the opposite direction at 5 ms-1. After the collision the bodies move off together with the velocity v. Calculate v.

This is probably basic to most, but I've just returned to college. I'm not looking for the answers as such, but rather if someone could point me to the right equation. The ones I've tried using are:

m1 u1 + m2 v2 = m1 v1 + m2 v2

and

mv = mv1+mv2

and

mv1 = (M = m)v2 (I think this is wrong because its for an inelastic collision)

Thanks for reading!

Matt

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# Homework Help: Working out the velocity after a collision

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