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IMG_2260.MOVA Rube Goldberg machine is an over complicated build to complete a simple task.
Our board has a Happy Birthday. Our board includes balloons, candles, a happy birthday sign, cupcakes, a present, and birthday confetti at the bottom for the finale.
This project was not the easiest thing I´ve ever done. We had many set backs and obstacles we had to over come. Our earliest obstacle was trying to put together our moving inclined plane/second class lever. We ended up adding a straw to a screw making the inclined plane able to move up and down.
Construction log:
Day 1: We finished our blueprint and started drawing out (on the board) where each piece would go.
Day 2: We began to brainstorm how all the pieces would work together in order to pull the popper and what we would need to do so.
Day 3: We began to build our first inclined plane using a 20 inch piece of wood with a screw on the top attached to a guitar string to go in the pulley and attach to the box. We put a screw through the board and through a straw and hot-glued the wood to the straw so the wood could go from a flat surface to an inclined plane.
Day 4: We started thinking about how we could build our screw. We tried a variety of ways and had a hard time finding the right one. One of the things we tried was twisting a hose around a wooden stick but the hose wasn’t bendy enough to twist perfectly around the stick. We then decided to try hot-gluing cardboard steps onto the stick in a downwards, circular form and then put tape on where the cracks and places the ball would fall out.
Day 5: We attached our lower inclined planes to the board and then drilled a screw up start of the inclined plane to hold the screw in place. We also attached our levers using the same tactic as the beginning inclined plane.
Day 6: We attached the wheel and axle to the board and added a cardboard basket into the wheel to hold the ball in. We then added two screws for a board to rest on and hold up our wedge and heavy block of wood.
Day 7: We soon came to the realization that the wheel and axle and wedge were not going to work out the way we had pictured. We then took that whole part out of our board and began to design new and well functioning steps. We decided that if we added a half pipe for the ball to gain slightly more force. We then thought of the idea to add a pull back car held back by a small wedge so that when the marble hits the car, the energy would transfer to the car and push past the wedge and then push a weight off of the piece of wood everything is resting on.
Day 8: We added finishing touches to our final blueprint and continued making sure everything was working correctly. We also began making our presentation. We finished our theme, 10 steps, five simple machines, and our schematics/final blueprint pages
Day 9: We added some decorations and made sure all of our steps worked properly worked and added some painting to make our machine more visually appealing. We also started to work on our calculations.
Day 10: We added some finishing touches to the board and practiced our presentation.
Velocity
The only time velocity occurred was in Our screw and our half pipe. The screw was towards the beginning and the half pipe was roughly half way through.
Mechanical advantage
There were only three spots with a mechanical advantage. The first one was in the beginning with a pulley and had a mechanic advantage of 2.
Acceleration
There were many instances of acceleration in out project. The first case was in the beginning when the ball went down the inclined plane. It continued onto the screw were it accelerated even more. After our half pipe was our last case of acceleration of the marble, It rolled past the flat piece of wood and gained acceleration going down the next inclined plane.
Force
Force was in play for almost all of out board. There was a force when our marble it the weight off the stand. That force was potential energy, going into kinetic energy, going to elastic energy. when our weight was falling it had potential energy till it hit our levers. the force of the weight hitting the levers was 490 Newtons.
Work
We did not have any main signs of work in out project.
Potential Energy
The first spot with potential energy was our marble rolling down our ramp. The next time with potential energy was the marble rolling down the next ramp to go to the half pipe. once the marble made it past the half pipe it went down another inclined plane which made potential energy. Finally the weight falling off the board and free falling was our last spot of potential energy.
kinetic Energy
There were very few spots of kinetic energy. our first spot was our marble hitting the the weight. Our last spot of kinetic energy was the weight hitting the levers.
Blue prints
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