Embedded Files
Evidence of Work
Evidence of Work
The Task :
The Task :
For this project we were told to build an energy efficient car prototype to present to Hyundai that rolls exactly 5 meters by itself. It also had to be able to securely carry two rolls of pennies (250 grams). I was in the same group as the last project, with Aidan Baggs, Analiese Engler, and Sola Takeda. Our group built 4 different prototypes, but ended up going with my rubber band car, because we thought it worked the best. This car is powered by spring energy. After we built our cars and made revisions, we made our pitch to Hyundai, which you can see below. I also attached our group Google Sheet, which has all of the data for our car.
Description of Process
Description of Process
First, we got with our group and brainstormed all of the different types of energy that we could use to power our car. We came up with a lot like ramps, magnets, balloons, and steam. In the end we went with rubber band and mouse trap cars. Analiese and I didn't have mouse traps, so we worked on different prototypes.
Next we blueprinted our cars and planned out what they would look like and materials we were going to use. Analiese and I helped each other with ideas and Sola and Aidan did the same.
After our plans were done, we finally started building our cars. We worked together to come up with more ideas and overall just helped each other throughout this process.
Once everyone was finished with their cars (or as good as the car was going to get), we started filming and made small revisions to our cars to try to get them to go exactly 5 meters.
We reviewed the videos and thought that my car worked the best, so we then collected the data from the video. In the Google Sheet above, you can see all of the data we took including velocity, acceleration, potential energy, kinetic energy, thermal energy, and more.
We then made a joint Google Slide and started on pitch to Hyundai. Our presentation is attached above, and includes pictures, videos, data graphs, and much more information on my car.
Content
Content
Spring Potential Energy (PEs) :
Spring Potential Energy (PEs) :
energy stored in an object due to expansion or compression (elastic PE)
measured in Joules (J)
PE = 0.5kx^2 potential energy = 0.5 (spring constant) (distance spring stretched squared)
Gravitational Potential Energy (PEg) :
Gravitational Potential Energy (PEg) :
energy an object has due to its position at a height or in a gravitational field
measured in Joules (J)
PEg = mgh gravitational potential energy = (mass) (acceleration due to gravity) (height)
Kinetic Energy (KE) :
Kinetic Energy (KE) :
energy due to motion
measured in Joules (J)
KE = 0.5mv^2 kinetic energy = 0.5 (mass) (velocity squared)
Total Energy (total E) :
Total Energy (total E) :
total energy together
measured in Joules (J)
Total energy = PE+KE total energy = potential energy + kinetic energy
Thermal Energy (TE) :
Thermal Energy (TE) :
energy transferred to heat
measured in Joules (J)
TE = total E - PE - KE thermal energy = total energy - potential energy - kinetic energy
over time all energy will be transferred to TE
Distance vs. Time :
Distance vs. Time :
measure of data that can show if the velocity is constant, and the displacement / distance of the moving thing at any time
Velocity vs. Time :
Velocity vs. Time :
shows exactly when the velocity increases / decreases and what the velocity was at any certain point in the object moving
Rotational Inertia :
Rotational Inertia :
the spinning motion that happens when something rotates around an axle
depends on the distance the weight is from the axis
Reflection
Reflection
Overall I think our group did very well for this project. We worked well together and got stuff done on time. All of our cars may not have been the best, but we collaborated a lot to try and make them better. We had good communication throughout the project, yet I think this project would've much more fun in person.
One thing I think I did well during this project was my time management skills. I pushed my group to get ahead in the beginning, so that in the end we had lots of time to practice and finalize our pitch to Hyundai. Also, I felt like I took a really good role in our group. I was encouraging and positive, yet I got down to business when we needed to get stuff done. I helped out in wherever I was needed, but I focused most of my time on doing things that I know I excel in. For example, the slideshow and building the car.
One thing I want to improve for the next project is my ability to present / talk about my work. I feel confident when I am in small groups, yet when it gets to bigger groups with people I am not familiar with, I start to feel uncomfortable. This makes me nervous and affects my presenting abilities. To help with this in the next project, I want to practice presenting a lot, so I am more familiar with the material and maybe even practice presenting to my family and friends.
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