group+008

[|MVI_0320.AVI]
 * Experiment**: Our experiment is an inelastic collision between a person skateboarding down a ramp and a backpack. The backpack will be handed off to the person skateboarding halfway down the ramp. After the collision, the two will continue down the ramp as one object.


 * Finding Velocities**: In order to fine the velocities we will find the lengths and time and then use vivfdat for the two halves. We will find the final velocity before the person grabs the backpack and the velocity at the end of the ramp.


 * Safety** **Precautions**: Good balance, railing


 * Data collection:** For this to work, we needed to find the angle of the ramp, the initial velocity of the skateboarder, any friction, the masses, the length and height of the ramp, and the time.

[|MVI_0320.AVI] Tape Measure Skateboard Ramp Heavy Backpack 1. Get all the measurements for the height and length of the ramp 2. Have one person stand at the top of the ramp on the skateboard. 3. Have another person stand halfway down the ramp, holding the backpack. 4. Have the person at the top start down the ramp WITHOUT pushing off (there must be no initial velocity) 5. Collect data/record
 * Procedure:** The objective of our experiment was to find if momentum was conserved in an inelastic collision.
 * Materials**:
 * Steps**:

. 1. No, momentum was not conserved because momentum was lost after the collision. The gained weight doesn't make up for the lost velocity so therefore the momentums were different. 2. Some sources of error could include: the measurement of the angels because we didn't have a protractor to measure exactly but rather had to use side lengths to figure it out. The margin of error could be small but that would still affect our results. Also the time used could be a little off because we didn't use a stopwatch but instead we used the time based on the video we took. We did not solve for the friction because we were on a relatively frictionless surface (tile and wheels) but there could have been some. Since we did not include it, that would have affected our data. In addition to those, the weight of the skateboard could be slightly different than the weight we got because we used a string to attach it to the scale and that could make the measurement a little larger.
 * Data**: To find the momentum both before and after the collision, we had to use the ViVfdat equations to find the final velocity of the first half and the initial velocity of the second. These two were different, because there was velocity lost when the person grabbed the backpack. For this, we needed the measurements and angles of both triangles; the whole one and the one that started halfway down the ramp. After we found the velocities,we used those and the masses to find the momentums before and after the collision, then found the percent error.
 * Conclusion:**