- 1

- 0

**1. Homework Statement**

A ball of mass

__0.440 kg__moving east (+x direction) with a speed of

__3.30 m/s__collides head on with a

__.220 kg__ball at rest. If the collision is perfectly elastic what will be the speed and direction of each ball after the collision?

**2. Homework Equations**

(.5)m1v1+(.5)m2v2=(.5)m1v1'+(.5)m2v2'

v1= m1-m2/m1+m2(v1) <---I want to how they got from the elastic equation to this

**3. The Attempt at a Solution**

Really more than anything I want to figure out how to derive the equation to find velocity. I've looked it up and I don't understand all the steps it took. So far I've figured out that

(.5)m2v2 is equal to zero. So the equation is (.5)m1v1= (.5)m1v1'+(.5)m2v2'. I want to understand every part before I start trying to find the solution.

I don't really understand physics so please be very specific. :/