Alejandro Rodriguez
April 26, 2017
In this lab, we want to see that in a two-dimensional collision and see if the momentum and energy is conserved within the collision.
We first get two balls which has relatively same mass and we put it on this glass table apparatus. On top of this apparatus is where you can put your phone to record the collision after you have changed the frame per second and to slow recording function. Also make sure the glass table is leveled, you can adjust it by changing the 3 legs of the table. Now place one of the ball on the table directly under the phone. Have your partner press record while you rolled the other ball so that it collides with the balled that was stationary and it goes in two different directions.
Now go get a laptop and open the video, edit the video so that it is the portion when the collision happens and nothing more. Now open Logger Pro and open that video file. Now you change the frame per second and starting graphing the two balls with the same masses velocities in the x-direction and the y-direction for the respective masses. Now do a linear fit to get the velocity value.
After doing this you create a new columns Xcm and Ycm and graph that . You also make graph which includes the Vxcm and Vycm.
After doing all this you want to do the same procedure again but with two different masses.
This is the collision between two different masses of balls.
This is the velocity of the balls with respective to the two balls.
Conclusion
I believe that in either part of this lab that momentum and energy is conserved. However there are some outside force as friction between the glass table and the balls that we need to take into account. In this lab I learned the concepts of momentum in two dimensions.
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