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

i'm retaking a test question for half credit and this is the 3rd part to the question. i know the velocities are correct because the teacher gave us the answers.

this SHOULD be simple... but okay.. (velocity) V1 = 20ft/s, V2 = 0ft/s. after the collision V1` = 16ft/s, V2` = 4ft/s. I'm supposed to find the coefficient of restitution. The formula for that (Partially elastic i assume) is (V1` - V2`) = -e(V1-V2). I get -.6 for e. but isn't e supposed to be between 0 and 1? the e is SUPPOSED to be 1/3 (given by the teacher). and i'm pretty sure i didn't copy that down wrong so it just doesn't make sense to me

2. Relevant equations

(V1` - V2`) = -e(V1-V2)

3. The attempt at a solution

(16ft/s - 4ft/s) / -20ft/s = -.6

Picture of the problem

http://i11.photobucket.com/albums/a162/daletron/untitled.jpg

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# Homework Help: Find the coefficient of restitution between the balls (should be easy!)

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