Two billiard balls are moving on a (coordinatized) pool table according to the respective paths x(t)=(t(adsbygoogle = window.adsbygoogle || []).push({}); ^{2}-2, [tex]\frac{t^2}{2}[/tex]-1) and y(t)=(t, 5-t^{2})

where t is time in seconds.

a) When and where do the balls collide?

I found where the 2 graphs intersect to be (2,1) so does that mean at 2 seconds 1 unit of distance away?

b) What is the angle formed by the paths of the balls at the collision point?

This is where I am stuck. Any hints on how to figure this out?

This is due Thursday and any help would be appreciated. Thanks!

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

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: Billiard Balls problem

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