Completely Inelastic Collision

1. Feb 21, 2008

hateAleen

After a completely inelastic collision, two objects of the same mass and same initial speed are found to move away together at 1/3 their initial speed. Find the angle between the initial velocities of the objects.

I think that this question is dealing with collisions in two dimensions. My textbook does not give any equations for completely inealstic collisions in two dimensions. Any help?

2. Feb 21, 2008

mgb_phys

It just means they stick together, so you have a final particle of 2*mass

3. Feb 22, 2008

hateAleen

I went through and ended up getting an answer of 45 degrees. But that ended up being wrong.