For our hybrid car we used rubber band power car. It used 8 CD's and a lot of duck tape (that was a joke). We had a couple of weeks to do it. In our first week it was only me because my other group members had other stuff to do but I made a plan and started the build. After the first week everyone was there and help by giving more ideas to make the car better. After about 3 weeks of building we finished the car and it could go to the 5 meter mark witch was awesome because I did not know that I rubber band could exert that much force but you learn something new everyday.
Physics Concepts
Potential Energy (spring): How much energy a spring, or rubber band, is storing. Measures in Joules (J). We used this to calculate how much energy the rubber band car had before we released.
Kinetic Energy: Energy due to motion. Measured in Joules (J). We used this to see how much of our potential energy was converted to movement force.
Thermal Energy: The energy not converted to kinetic, and instead converted to things like sound and friction. Measured in Joules (J). We used this to see how ineffective our cars could be.
Spring Constant: How difficult it is to move a spring. the higher the spring constant, the harder it is to move. We used this to help us find out how difficult, or easy, it was to stretch our rubber band.
Reflection
When we first started the project I was alone because my other group members were not there. The next week they were here so we all put our ideas in and after the next week or longer we finished the project. All we had to do was in presentation. Everyone was amazing! We all worked so well together and got all our work done. Unfortunately Ben, a group member, accidentally broke the car but it was an easy fix and the car work even better then it did before so thanks Ben. Everyone else was awesome!
I learned that I still have to let other peoples ideas have a chance. After I let my other group member ideas happen the car was better. I also learned that I can not do it all. Even thought the car broke with out that break the car would not be as good. I differently have to work on listening especially with ideas. I also need to work on cooperation because I wanted to do it all by myself.
Potential Energy (spring): How much energy a spring, or rubber band, is storing. Measures in Joules (J). We used this to calculate how much energy the rubber band car had before we released.
Kinetic Energy: Energy due to motion. Measured in Joules (J). We used this to see how much of our potential energy was converted to movement force.
Thermal Energy: The energy not converted to kinetic, and instead converted to things like sound and friction. Measured in Joules (J). We used this to see how ineffective our cars could be.
Spring Constant: How difficult it is to move a spring. the higher the spring constant, the harder it is to move. We used this to help us find out how difficult, or easy, it was to stretch our rubber band.
Reflection
When we first started the project I was alone because my other group members were not there. The next week they were here so we all put our ideas in and after the next week or longer we finished the project. All we had to do was in presentation. Everyone was amazing! We all worked so well together and got all our work done. Unfortunately Ben, a group member, accidentally broke the car but it was an easy fix and the car work even better then it did before so thanks Ben. Everyone else was awesome!
I learned that I still have to let other peoples ideas have a chance. After I let my other group member ideas happen the car was better. I also learned that I can not do it all. Even thought the car broke with out that break the car would not be as good. I differently have to work on listening especially with ideas. I also need to work on cooperation because I wanted to do it all by myself.