3D print project – physics 11

the design original:

This is my original model, I stopped designing this as i discovered that I would be very hard to print the hollow design while having the wheels inside of the car.

official design:

this is my second and final design, I had created it so that the wheels would turn outside of the car, and be attached by a dowel on the bottom. I used a wooden dowel instead of printing one. Then I decided the best way to print a hollow car design would be on its side. I had noticed that my car had details that weren’t touching the ground, therefore I had to extend them down allowing them to print without collapsing.

The outcome:

my problem:

in this project I wanted to Determine if it’s getting cart is more efficient than a rolling cart. I had created the model of my car and noticed that the wheels would not walk on a flat surface like linoleum, therefore I had to get my car on linoleum and roll the car on cement. Here are demonstration and the math components of my experiments:

the demonstration of Cement vs. Plastic:


the demonstration of Linoleum vs. Plastic:


the math:

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From the data found, I can positively say that a skidding car (10%) is less efficient by significant percentage (%67) than a rolling car (77%),  meaning a rolling car loses less energy than a skidding car. Some inefficiencies of my experiments would be; my car breaking between trials due to hard impact, my ruler measurements, my slow motion estimated time signatures, the µ measurements from online that may not have been 100% true to my exact situation, my own accounting of air friction and other components that cause energy loss, The distances were not the same, etc.

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