The Mystery Machine
For the past five weeks our class has been learning and working on our Rube Goldberg machines. A Rube Goldberg machine is defined as a complex machine used to complete a simple task. Our fist three days of our project was planning and sketching out what we were going to do. The next nine days were devoted to building our actual machine. In these nine building days we completed our project with an end result being that we poured "Scooby Snax" into a bowl. Our last three days were tweaking our machine and creating our presentation. If you are wondering why we called the dog kibble "Scooby Snax", it is because our project was the made up after the t.v. show and movies of Scooby Doo. Our project was creatively named The Mystery Machine after the van from Scooby Doo. We had 12 steps before our end result with five simple machines. The five simple machines were an inclined plane, a screw, a wheel and axle, and a lever. This was a great first project to kick off the year.
Concepts
1) Wedge - .78kg (weight), 7.64N (force), W = .38J
Work is the amount of energy put into something. This is calculated by force times distance. the unit for work is jewels.
2,3,4) Dominoes - fall when their center of mass gets outside their base. This is called toppling.
5) 1st incline plane - .5m(long) .05m(wide) 9.8m/s^2 / 10 A = 1m/s^2 MA=10
The mechanical advantage is how you can make a hard task even easier. this is calculated by the force with the machine divided by the force without the machine.
6) Screw - .29m (distance) .07m (height) MA ideal = 20.57
To get the mechanical advantage of the screw you take a long string and wrap it inside the screw and hen measure how long the string was.
7) Wheel and axle - .18m (distance of wheel) .08m (distance of axle) MA ideal = 2.25
To get the mechanical advantage of the wheel and axle you multiply the circumference of the wheel and the circumference of the axle
8) Lever - .0095kg (mass of the ball) (9.8m/s^2/2) (acceleration) Fball = .05N
For the lever I did the force of the ball. the force is a push or pull of an object that causes a change in motion
9) 2nd incline plane - .8m(long) .12m(height) PE = .021J
I did the potential energy of the incline plane and the ball rolling down it.
10) Ball falling - 9.5N(mass of the ball) 9.8m/s^2(acceleration) F = .093J
I also did the force for the ball falling.
11) Tube - 0.56m(length) 0.76s(time the ball the takes to go down the tube) V = .737Steps:
For the tube we had the ball go through to knock the cup over we did the velocity which is the rate of covered distance in a direction.
Work is the amount of energy put into something. This is calculated by force times distance. the unit for work is jewels.
2,3,4) Dominoes - fall when their center of mass gets outside their base. This is called toppling.
5) 1st incline plane - .5m(long) .05m(wide) 9.8m/s^2 / 10 A = 1m/s^2 MA=10
The mechanical advantage is how you can make a hard task even easier. this is calculated by the force with the machine divided by the force without the machine.
6) Screw - .29m (distance) .07m (height) MA ideal = 20.57
To get the mechanical advantage of the screw you take a long string and wrap it inside the screw and hen measure how long the string was.
7) Wheel and axle - .18m (distance of wheel) .08m (distance of axle) MA ideal = 2.25
To get the mechanical advantage of the wheel and axle you multiply the circumference of the wheel and the circumference of the axle
8) Lever - .0095kg (mass of the ball) (9.8m/s^2/2) (acceleration) Fball = .05N
For the lever I did the force of the ball. the force is a push or pull of an object that causes a change in motion
9) 2nd incline plane - .8m(long) .12m(height) PE = .021J
I did the potential energy of the incline plane and the ball rolling down it.
10) Ball falling - 9.5N(mass of the ball) 9.8m/s^2(acceleration) F = .093J
I also did the force for the ball falling.
11) Tube - 0.56m(length) 0.76s(time the ball the takes to go down the tube) V = .737Steps:
For the tube we had the ball go through to knock the cup over we did the velocity which is the rate of covered distance in a direction.
Reflection
Over all I believe that my group worked very well together and we got our project successfully done. Our project went pretty well. For our project what I thought went well was our team work and knowledge of safety. My group was great with the power tools and we each shared and let others have turns. I think for the next project we should work on pacing our selves because I think in the end we were trying to pull it all together and get our calculations and presentation done. Next time we need to manage our time better. Managing our time would be a better idea because then we don't need to rush and we get get it done thoroughly.
I feel that I learned a lot about myself and a lot about the knowledge of physics. I learned two important traits about myself. One being that I can take a leadership role. The second trait I learned about my self was that my mind likes the equations and the math put into doing physics such as calculating the force, the mechanical advantage, the acceleration, and plenty more. I really enjoy Mr. William's teaching ways because it helps me learn in an action type teaching. He makes it fun and exciting while at the same time he is teaching us all about physics and engineering.
With all the good to this project there were some things that we needed to improve on such as time management and giving everyone a job so we could all be productive every day. These are good things to learn in life and I can't wait to apply them to the real world and to the next projects to come .
I feel that I learned a lot about myself and a lot about the knowledge of physics. I learned two important traits about myself. One being that I can take a leadership role. The second trait I learned about my self was that my mind likes the equations and the math put into doing physics such as calculating the force, the mechanical advantage, the acceleration, and plenty more. I really enjoy Mr. William's teaching ways because it helps me learn in an action type teaching. He makes it fun and exciting while at the same time he is teaching us all about physics and engineering.
With all the good to this project there were some things that we needed to improve on such as time management and giving everyone a job so we could all be productive every day. These are good things to learn in life and I can't wait to apply them to the real world and to the next projects to come .