(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Consider a pool table that contains two identical balls. Ball 1 is rolling at a speed of 1.1 m/sec when it hits ball 2 which is at rest. The coefficients of friction between the balls and the table are 0.8 (potential) and .5 (kinetic). The collision is perfectly elastic and there is no friction between the balls. How far will ball 2 skid before it is rolling without sliding.

2. Relevant equations

Speed - (Friction * Kinetic Energy)

3. The attempt at a solution

This seems rather simple, but I would like to check my work. Simply I need to find when the ball has overcome the force of friction, so wouldn't it be,

1.1 (velocity) - 9.8(friction) * .5 (kinetic energy) = 0?

if so that would turn out to be

t = 1.1/4.9 = .22 seconds

putting that back into the equation

1.1 = 4.9 * (.22) = .022 m

I am not quite sure if this is the correct approach to this problem, so help would be appreciated. Thanks in advance.

**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: Elastic Collisions

Can you offer guidance or do you also need help?

Draft saved
Draft deleted

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