# Analysis of collisions from data

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1. Feb 12, 2017

### xjcov

Good afternoon! I would like to preface by saying, yes, this is for a project. I am only posting here to see if my method of solving is correct before I finish the project incorrectly.
1. The problem statement, all variables and given/known data
I chose two balls, mass A: .553 kg and mass B: .410 kg
I recorded their collision and plotted the points on Tracker: http://physlets.org/tracker/
Through the analysis of the horizontal component of mass A (before the collision), I have determined the speed is 1.72m/s. On the horizontal component of mass B (before the collision), the speed is -3.704m/s. I have to find the momentum (kg m/s) and kinetic energy (J) of each collision and of the total system. Is my attempt correct? If not, can someone point me in the right direction?

2. Relevant equations
momentum: p = m*v
kinetic energy: 1/2mv2

3. The attempt at a solution
mass A momentum: (.553)(1.72) = 0.9511 kg m/s
mass A kinetic energy: 1/2(.553)(1.722) = 0.8179 J

mass B momentum: (.410)(-3.704) = -1.5186 kg m/s
mass B kinetic energy: 1/2(.410)(-3.7042) = 2.8125 J

For the total system I just added the values.
momentum: .9511 + -1.5186 = -.569
kinetic energy: .8179 J + 2.8125 J = 3.6304 J

2. Feb 12, 2017

### Staff: Mentor

That is fine so far.

3. Feb 12, 2017

### xjcov

Awesome! Thanks for the help!