AP Sect 2 and Honors Sect 2 Lab Data

Here are links to lab data. Note that I have done all the calculations for Honors. AP calculations were done by the students but they still have to calulate percent errors. Note that in many cases percent error is similar for p before = p after and Delta p Wanda = -Detla p Dora, but for both carts having an initial velocity the delta p error is much more reflective of the accuracy of the trial.

Your job is to figure out all the equations used in each column after tb2 and write them out in your lab discussion. Your report is a formal one including error analysis and GOOD conclusions. In addtion, each group must email one spreadsheet to me with the values repaced by the formuale you figured out for the cells after tb2. Because of the extra work, the lab is due Thursday. I expect each group to meet before then.

Gate a is the window gate, gate b is the door side gate. Note that if Wanda is more massive than Dora then Wanda will go through gate b after the collision. If Dora is more massive than Wanda then Wanda should go back through gate a and her velocity' will be negative. In fact any nonzero ta2 reading from gate a will represent a negative v' for Wanda. Wanda may also go back if Dora is about as massive and is moving before the collision.

Also note that if ( and only if) Dora is moving before the collision .025 /tb1 gives her velocity and it is NEGATIVE! and tb2 will give v' for Dora and it is positive.

Also note if you are going to use a cell in a calculation it must be a number only, NO LETTERS.

AP:http://h1.ripway.com/DrCherdack/Momentumvalssect2.xls

Honors: http://h1.ripway.com/DrCherdack/Momentumvalshonsct2.xls