Hot+Wheels+Project

**Our Hypothesis** The speed of the car will increase as the weight on the car increases.
 * Part One - Does the weight of the car increase it's acceleration?**

**How we organized it** How did we control our variables, and how did we gather our data? We first checked the weight of the three cars so that we can make sure they are about the same. We made some lines on the floor to check that the track was always in the same place. The dropper said, “3, 2, 1, GO” When the dropper said go, the timer starts the time, and when the car hit the blue wall, the timer stops the time. First, we made a table. We were going to do two trials per weight, but we changed to ten because it was more accurate. We were going to make a table but it was too big so we just scribbled a list of trial time in a piece of scrap paper.
 * Controlling Variables**
 * Gather Data**

**What we did** Here are links to the youtube videos: [] []

Explain in detail in step by step, what we did, who did what
 * First, we gave everyone a job. This is because if everyone had a job they would all be busy doing their own things, instead of sitting down watching and doing nothing. Also, we can control the variables. Koichi was the dropper for the hot wheels cars, Emiliano was the timing the cars speed. Satoki was the collecter of the cars, Isha was the adder, of all the trails so we can get the average of the cars speed. Jiwon was the writer, and she wrote the time of the speed for each trial. Lastly Mr. Dwyer was the fixer, like if the track broke he fixed it again.
 * After giving everyone a job, we started to test the cars and if the track had any problems. Then, we taped the weights on the cars. We put on different kinds of weights, like 10grams, 20grams and 50grams. We had red car, green car, and purple car. We put the different weights on each car.
 * Each car had 10 trials of each weight. After doing tests on each car to make sure that the weight was safe, we started to do the trials.
 * It took us ALL DAY!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
 * 3 cars x 4 different weights x 10 trials each = 120 HOT WHEELS RACES (plus outtakes!!!!!!!!!!!)
 * After, doing 10 trials for each car and each weight, we added the trials for each thing and got the average! It was exhausting!!!
 * After we found the average we made it into a Graphs.



**Our Data** Note: for all these graphs we used a website called Kidz Zone: Create a Graph (it is cool!) []

__**The Individual Trials (no weight, 10g, 20g, 50g) - Line Graphs**__


 * Red Car**
 * Green Car**
 * Purple Car**

__**Comparison of Trials - Multi-Line Graphs**__


 * Red Car**
 * Green Car**
 * Purple Car**

__**Average Time to Weight Comparison for all Cars**__

**Conclusions**

We have to reject our original hypothesis, because the more weight the cars have then it's more slower. If the car is heavier then it gets slower when it goes to the flat piece of track because the weight is pushing the car down so it is slowing down.

**The Forces - An Explanation**

The weight on the car helps the acceleration in the slope but when it is in the flat part of the track the weight plus the gravity smooshed the car which made it decelerate. The flat part is longer than the slope, therefore the weight makes the car slower which will increase the time to the end to the track.