PROJECT DESCRIPTION: In this project we had to make a car and make it travel exactly 5 meters with out pushing it, while holding 250g which is exactly 100 pennies worth of weight. This was a project originally given by Hyundai car company to pitch an idea that would work for them. We had to find an alternate power source then just a motor we could use anything from, mouse traps, rubber bands, and pressurize air in the form of a balloon.
CALCULATIONS: In this project we needed to find the potential energy, spring constant, velocity, and kinetic energy.
POTENTIAL ENERGY SPRING: Potential energy is the energy possesied inside an object when released it changes in to either kientic or thermal energy. In order to find the potential energy you need to equation PE=1/2kd^2. This means the potential energy spring equals one half times the spring constant times the distance squared. We plugged in 45.5n/m for the spring constant and .3 meters for the distance then squared the distance and multiplied it by 45.5n/m and got, 4.1 then we had to multiply that by .5 which is the same as dividing it by 2. So the final potential energy spring was 2.05 Joules.
KINETIC ENERGY: Kinetic energy is the energy used to move an object forward. When finding the kinetic energy we used the equation, KE=1/2mv^2. However we going the kinetic energy for every meter giving us three diffrant equations.
1) Kinetic energy equals one half times 7.75kg, which is the weight of our car, times 1.69m/s squared. 1.69m/s squared equals 2.86m/s. So then it's 2.86m/s times 7.75kg times one half which equals 1.1J for the first meter.
2) Kinetic energy equals one half times 7.75kg times 1.61m/s squared. 1.61m/s squared equals 2.6m/s. So then it's 2.6m/s times 7.75kg times one half which equals 1J for the second meter.
3)Kinetic energy equals one half times 7.75kg times 1.47m/s squared. 1.47m/s squared equals 2.16m/s. So then it's 2.13m/s times 7.75kg times one half which equals .84J for the third meter.
SPRING CONSTANT: Spring constant is force contained in springbefore being released. The equation you use to find the spring constant is f=kd. Which can be rewritten as k=f/d. So we have the spring constant, k, equals force divided by the distance. So it's 5n divided by .11m. That gives us a spring constant if 45.5n/m.
VELOCITY: VElocity is the speed of an objecct in a sertian direction. The equation for velocity is v=d/t. However we found the velocity of the car at three diffrant spots, the first meter, decline meter and third.
1) Velocity equals distance divided by time. So I plugged in 1m for distance and diveded it by .59 seconds. That gave me an answer of 1.69m/s for the first meter.
2) Velocity equals distance divided by time. So I plugged in 1m for distance and diveded it by .68seconds. That gave me an answer of 1.47m/s for the first meter.
3)Velocity equals distance divided by time. So I plugged in 1m for distance and diveded it by .62seconds. That gave me an answer of 1.61m/s for the first meter.
KINETIC ENERGY: Kinetic energy is the energy used to move an object forward. When finding the kinetic energy we used the equation, KE=1/2mv^2. However we going the kinetic energy for every meter giving us three diffrant equations.
1) Kinetic energy equals one half times 7.75kg, which is the weight of our car, times 1.69m/s squared. 1.69m/s squared equals 2.86m/s. So then it's 2.86m/s times 7.75kg times one half which equals 1.1J for the first meter.
2) Kinetic energy equals one half times 7.75kg times 1.61m/s squared. 1.61m/s squared equals 2.6m/s. So then it's 2.6m/s times 7.75kg times one half which equals 1J for the second meter.
3)Kinetic energy equals one half times 7.75kg times 1.47m/s squared. 1.47m/s squared equals 2.16m/s. So then it's 2.13m/s times 7.75kg times one half which equals .84J for the third meter.
SPRING CONSTANT: Spring constant is force contained in springbefore being released. The equation you use to find the spring constant is f=kd. Which can be rewritten as k=f/d. So we have the spring constant, k, equals force divided by the distance. So it's 5n divided by .11m. That gives us a spring constant if 45.5n/m.
VELOCITY: VElocity is the speed of an objecct in a sertian direction. The equation for velocity is v=d/t. However we found the velocity of the car at three diffrant spots, the first meter, decline meter and third.
1) Velocity equals distance divided by time. So I plugged in 1m for distance and diveded it by .59 seconds. That gave me an answer of 1.69m/s for the first meter.
2) Velocity equals distance divided by time. So I plugged in 1m for distance and diveded it by .68seconds. That gave me an answer of 1.47m/s for the first meter.
3)Velocity equals distance divided by time. So I plugged in 1m for distance and diveded it by .62seconds. That gave me an answer of 1.61m/s for the first meter.
OUR CAR: This is out original design for our car.
REFLECTION: Our group worked really well in this project. However in the beginning we did not, I didn't work well with the group however after a intervention with Mr. Williams we all worked together. By the end of this he project we worked well with each other staying on task. This is why we all recived high work ethic and communication grades. I can still work on improving my work ethic by staying on task and not going to other groups when we are working. I think a large pit for me in this project was the begining since I didn't contribute to the group however at the end we all worked really well with each other so it ended quite well for me and mt group. I also felt our group did really well when we came across a problem we would all work together to find a solution which helped the whole team.