group+013

= __**Conservation Of Momentum Project**__ =
 * Chris Towner, Sam Bresler, Joo Kim, Mike Ross **

Our idea is to have two people on skateboards, one at rest and one moving down an incline. The one at rest will stand at the bottom of the incline inline with the skater at the top and when the skater in motion approaches the skater at rest, (s)he will hold out his (her) arms and push the person at rest. We will measure the momentums at each distance to see if momentum was conserved. We will find the velocities by measuring the displacement over a certain amount of time. We will use 2 times, 2 skateboards, 2 people, and a meter stick to conduct the experiment. media type="file" key="01-07-09_1450-1.3gp"

//**__Procedure__**//
Our experiment involves having one person go down a ramp on a skateboard, and then run into another stationary person on a skateboard at the bottom of the ramp. An Elastic collision will occur, and the stationary person will move away from the person that was going down the ramp, until they are stopped by friction. Using the data collected we will try to prove that momentum was conserved in this collision.
 * __Our Experiment:__**

We are going to do three trials of the collision to collect data for the experiment. The data we will need is: The distance of the ramp, the displacement of the stationary person after the collision, the angle of the ramp, the time it takes the person to get down the ramp, and the time that the person at the bottom of the ramp is in motion after the collision. To collect doth of the distances needed, we will use meter sticks. For Both of the times needed, we will use stopwatches, and then average the times of the three trials. To find the angle, we will use a protractor. Another piece of information we need it the displacement in the Y direction (Down) of the ramp. To find this, we will take the angle and distance of the ramp, and use trigonometry.
 * __Collecting the Data__**

__**How to find the velocities**__ The problem we have faced involving this experiment was finding the velocity right before the impact. In other words, the final velocity of Skater A needed to be found. Therefore, we first used our meter stick to find the distance from the starting point and the end point. After finding the distance, we used the angle finding device and found the angle, which allowed us to find the parallel integral of it for the acceleration. Now that we have at least three variables, which are Vi, a, and DX, we are now able to find the final velocity, Vf. We used the number we have found and plugged it into the variables of the ViVfdat equation, so we can find the missing variable of Vf.

After calculating the velocities and momentum, we came up with a 29% error, which means that momentum was not conserved. This can be attributed to many different sources of error, such as: -Constant velocity in each trial -Human error in accidentally pushing the second mass, falling, and skateboard issues -Measurements being off because of inconsistencies with balance Forces were neglected in the experiment and therefore could be off along with the other sources of error.
 * __Conclusions__**

__//**Data Collection:**//__
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Skateboards Used:**