Hi,(adsbygoogle = window.adsbygoogle || []).push({});

I am having trouble recalling my concepts in momentum. I just remember its conserved

Plus, I am horrible with directions, so need help understanding this problem, as well as the underlying concepts.

Two pool balls are rolling along a pool table. The orange pool ball has a velocity of 15 cm/s west and the green ball a velocity of 15 cm/s north 30° east. What are the velocities of the balls after the collision?

What I am doing is as follows:

15*m + 15*m = m(15 + 15)

which doesn't take me anywhere

Do I need to resolve into x and y components?

So any help on this question would be greatly appreciated. I will try and return the help by helping others. (i.e. pay it forward!)

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Conservation of momentum - Collision of pool balls

**Physics Forums | Science Articles, Homework Help, Discussion**