- #1

redivider

- 8

- 2

## Homework Statement

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A cylinder with mass 3kg slides on ice with its base surface at 5m/s and collides with an identical but stationary cylinder. The collision is elastic. After the collision, the center-masses of the cylinders move at angles 45 and 30 degrees from the starting direction, What is the rotational energy of the first cylinder?

Ok so the problem I am having here is that I cannot picture the problem and that is why I am asking here as there is no sketch in the book. I do not understand how the angles are set up.

## Homework Equations

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Is it any of these? :

**http://i.imgur.com/mXYFaDV.png**

I'm feeling pretty dumb, bear with me .

## The Attempt at a Solution

Not yet attempted.