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## Homework Statement

Three billiard balls are placed at rest on a level surface. Each ball has a mass of .15 Kilograms. If Ball 1 (m1) has an initial velocity of 10m/s towards ball 2 (m2), and after the glancing collision ball 1 (m1) moves 3m/s towards ball 3 (m3). Find the average force acting on ball 1 (m1) during the collision if that collision lasts for .025 seconds?

## Homework Equations

## The Attempt at a Solution

I know you have to use the formula Vf=Vi+at. And then maybe use [tex]\sum[/tex]F=ma to get the force. I am having trouble grasping the vector idea of the problem and combining them. Thanks!