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**Conservation Of Momentum**

**1) Two figure skaters are facing each other, with their palms together.Both skaters are intially at rest on a frictionless surface. The 1st skater has a mass of 40kg and the 2nd skater has a mass of 60kg. 1st skater pushes off of skater ( 2nd one ) in such a way that skater #1 moves left and skater #2 moves right. After the puss off skater #2 moves with velocity of 6m/s. Determine the direction and volecity of skater #1 after the push.**

Now this is as far as I know a recoil problem. Where do I start at ? I came up with an answer of 9 seconds but the way I did it looks way too easy. Could some one help me out with this one ?

Here`s another one.

**2) A 100kg fullback is running due west with a velocity of 10m/s. At the goal line he collides head-on with a 120kg linebacker, moving due east at 8m/s. Based on the info given, does the fullback drive the linebacker into the end zone or is he pushed backwards by the linebacker ? Explain the reasoning.**

I found the forces of both runners.

- Fullback - 1000N
- Linebacker -960N

So the fullback should make it into the end zone, cause he is running with bigger force than the linebacker.