1. Rube Goldberg Project
The Yahtzee Roller

2. Project History: Problems

3. Levers Levers would hit and twist changing the angle
The ball would then fall in the wrong spot
Most challenging part of the machine

4. Golf Ball Fall
The golf ball would fall into one side of the cup tilting the cup making the ball fall out
This wouldn’t give us enough force to pull the wedge and knock the cup over

5. The Wedge The marble would not roll out of the knock-over cup
As well as the wedge would be pulled right from under the cup
Second most challenging part of the machine

6. Project Evolution

7. First Day

8. Day Two

9. Day Three

10. Day Four

11. Day Five

12. Day Six

13. First Sketch

14. Blueprint Schematics

15. Calculated Physics Explained physics of each step
Using different equations we learned in class
Work=Force x Distance
Velocity=Distance ÷ Time
MA= Output Force ÷ Input Force
Force=Mass x Acceleration

16. Step 1: The Beginning Pulley
Used a pulley with a mechanical advantage of 1
All the force we exert using the pulley transfers to the first domino
MA=output force ÷ input force

17. Step 2: Dominos & Golf Ball
All of the kinetic energy is transferred to the next domino
Force= Mass x Acceleration
Force=4.46N

18. Step 3: Golf Ball Lever
The golf ball falls onto the lever pushing it down knocking the next lever up
MA=input distance÷ output distance
Mechanical advantage of the first lever is 1.15
.87 =OF ÷ 4.46N
Output Force=3.88N

19. Step 4: Marble Lever
The First lever hits the second lever tilting the lever downward releasing the marble
MA=Input Distance÷ Output Distance
MA=1.84

20. Step 5: Incline Plane Compilation
The Ball rolls down the incline plane
The inclined plane has a mechanical advantage of 1.22
MA=Output Distance÷ Output Distance

21. Step 6: Single Incline Plane
The marble rolls down the incline plane hitting the golf ball
Velocity=Distance ÷ Time
Velocity=0.3m/s

22. Step 7: Pulley
The Golf Ball falls into a cup pulling on the pulley pulling out a wedge
The Mechanical advantage is the number of ropes not including the downward pull rope
So the mechanical advantage is 1

23. Step 8: Wedge
The wedge is pulled out by the pulley knocking over a cup
The force required to pull it out is 0.1N

24. Step 9: Screw The marble rolls down the screw hitting the car
F=mass x acceleration
The marble hits the car with 0.7N

25. Step 10: Car to Cup
The marble hit the car which rolls into the cup knocking it down
The car needs 0.3N to be pushed over
The cup needs about 1N to be pushed over