group+016

For our experiment, we are going to do two sets of problems, one with friction and one without friction, to show the conservation of energy. We will have a ramp and roll a car down to stick to a car at rest at the bottom of the rest for an inelastic collision. In one problem, the cars will go off of a table for a bomber problem without friction, and the other problem will have the cars roll to a stop with friction. Both problems should conserve the momentum and we will be able to prove using both problems.
 * Overview**

 **__Equipment:__**  **__Safety Precautions:__**
 * Meter Stick
 * Scale
 * White Board
 * Carbon Paper
 * Two Toy Cars (varied sizes)
 * Velcro
 * Two Magnets
 * Tape
 * Table
 * Spring Scale
 * Books
 * Paper
 * <span style="font-family: Arial, sans-serif;">Calculator
 * 1) <span style="font-family: Arial, sans-serif;">Make others aware before cars are dropped
 * 2) <span style="font-family: Arial, sans-serif;">Make sure all people and obstacles are out of cars path
 * 3) <span style="font-family: Arial, sans-serif;">No open toed shoes

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<span style="font-family: Arial, sans-serif;">__**Procedure:**__ <span style="font-family: Arial, sans-serif;">//The Experiments:// <span style="font-family: Arial, sans-serif;">A ramp was made out of a white board, which we leaned against a wall. Then we found two cars, attaching magnets to the back bumper of Car #1, which went down the ramp, and the front of Car #2, which was placed a distance away from the ramp (so it faced the on coming vehicle). We made sure the car falling would have a chance to roll on the tile before the collision, in order to avoid other potential factors messing with our numbers. After the collision they'd stick inelastically and roll a distance. Later we did another experiment, rebuilding the ramp on a table, and creating a bomber problem. We used the same board, the same height, and the same angle. The car that went down the ramp and off the side of the table was also Car #1, like we used in the first experiment. Last, we measured friction by using spring scales and the attached vehicles.

<span style="font-family: Arial, sans-serif;">**Step by Step** <span style="font-family: Arial, sans-serif;">//Part A: Main Experiment//
 * 1) <span style="font-family: Arial, sans-serif;">After careful set up – white board leaning against the wall, books to stand it up, and all measurements taken (height of ramp, angle, mass of cars, and position of Car #2) – Car #1 is placed on the top of the ramp. There it is held, while Car #2 is set a distance away from the ramp. They are both aligned so it is a direct hit.
 * 2) <span style="font-family: Arial, sans-serif;">The first car is released from the ramp, hitting the car, and the magnets stick. Give a few seconds to allow the now two conjoined cars to make a complete stop.
 * 3) <span style="font-family: Arial, sans-serif;">Measure the distance of the two cars from Car #2's original position.
 * 4) <span style="font-family: Arial, sans-serif;">Repeat 1-3 to make sure there is consistency.

<span style="font-family: Arial, sans-serif;">//Part B: Bomber Problem//
 * 1) <span style="font-family: Arial, sans-serif;">Clear the space on a table and anything below it. Take careful measurements of the height of the table (used later as the Y displacement) and set up ramp. The measurement of height and angle of the ramp is replicated from what is used in Part A to remain consistent.
 * 2) <span style="font-family: Arial, sans-serif;">Carbon paper is placed on the ground to later measure the X displacement of the future bomber problem.
 * 3) <span style="font-family: Arial, sans-serif;">Car #1 is placed on top of ramp.
 * 4) <span style="font-family: Arial, sans-serif;">Release Car #1, letting it roll down the ramp, on the table, and finally off it. Allow the car to make a complete stop.
 * 5) <span style="font-family: Arial, sans-serif;">Pick up the carbon paper and measure the distance.
 * 6) <span style="font-family: Arial, sans-serif;">If the car fails to hit the carbon paper the first time, adjust and repeat 1-5 till an accurate number is achieved.
 * 7) <span style="font-family: Arial, sans-serif;">Once the number is found, solve. This is a basic bomber problem so PUKEM is necessary. Given the now acquired distances of X and Y, the initial velocity should be found for Car #1.

<span style="font-family: Arial, sans-serif;">//Part C: Friction// <span style="font-family: Arial, sans-serif;"> <span style="font-family: Arial, sans-serif;">**Conlcusion** Our momentum should have been conserved, but out data showed that it wasn't. It is possible that our measurements were off or that we didn't add in the right amount of friction. In theory, the momentum of car 1 should be equal to the total momentum of car1 and car 2 after the collision. Many errors could have occured to effect our results. Car one may have bumped car 2 a little bit before sticking together to form the inelastic collision we were looking for. This could have slowed the velocity, giving us a new momentum rather than the original. Also, our ramp wasn't fixed in the exact same spot so the angle may have changed, effected the velocity each trial as the car made its collision. Lastly, when finding the velocity of car one before the collision using a bomber problem, the cars fall was not consistent and difficult to make sure it was accurate. Overall, we collected all the data we needed to sufficiently prove our experiment. <span style="font-family: Arial, sans-serif;"> The Work
 * 1) <span style="font-family: Arial, sans-serif;">Because friction is a factor when the objects collide, it must be solved for.
 * 2) <span style="font-family: Arial, sans-serif;">A spring scale must be used to measure the force of friction.
 * 3) <span style="font-family: Arial, sans-serif;">Attach the two magnetized cars together, as they'd look after impact, and attach spring scale.
 * 4) <span style="font-family: Arial, sans-serif;">Carefully hold the spring scale and pull at a constant speed.
 * 5) <span style="font-family: Arial, sans-serif;">Once the reading becomes consistent, record it.
 * 6) <span style="font-family: Arial, sans-serif;">Using it, solve for friction. Then use F=MA to find the accelerating as the move after the collision.
 * M || V || P || M || V || P ||
 * .714 || 1.2 m/s || .8586 || 1.531 || 1.46 || 2.2 ||
 * .817 || 0 || 0 ||  ||   ||   ||