# Homework Help: Quick homework check !

1. Dec 11, 2005

### elle

Quick homework check plz!

Two particles of masses 1 and 2 are moving with velocities 4i and i-√3j on a smooth table. They collide and stick together.
Show that the resultant particle has velocity 2(i-j /√3)
My solution so far:
http://i26.photobucket.com/albums/c109/mathsnerd/e1f01885.jpg" [Broken]
Have I approached the question correctly by using the conservation of momentum equation and is my last line the same as the answer given in the question? I'm not too fond of cancelling square roots...

Last edited by a moderator: May 2, 2017
2. Dec 11, 2005

### Staff: Mentor

Looks OK to me. (The arrow you drew to represent the final velocity isn't pointing in the right direction, though. )

To simplify the last expression, divide each term by 3, realizing that $3 = \sqrt{3} * \sqrt{3}$.

3. Dec 11, 2005

### elle

oh, thanks! glad to know im doing it right