1. Creators Justin Koozer Andrew Wiseman Chris Whitaker Anna Davis
Simple Smoothies
Creators
Justin Koozer
Andrew Wiseman
Chris Whitaker
Anna Davis

2. Purpose
The purpose of our project was to use a Rube-Goldberg device to utilize several different changes in energy to produce a simple task. (i.e. A delicious smoothie.)

3. Overview We have three major transfers of energy:
A perfectly in-elastic collision, the change from potential energy to kinetic energy, and the conservation of momentum.
We assume all energy loss is negligible.

4. Transfers 1st transfer (spring force to in-elastic collision)
A compressed spring is released, firing ball which forms an perfectly in-elastic collision with a hanging box.
½ mv^2+mgh+Win= ½ m1v1^2+m1gh+Eloss
Win = ½ m1v1^2
V1=8.944 ft/sec
m1v1+m2v2=(m1+m2)v’
V’=2.68 ft/sec
m1,v1=ball, m2,v2=box
v’=box and ball

5. Step 1 KE PE

6. 2nd Transition ½ mint.vint.+ mghint= ½ mfinalvfinal + mghfinal
There is a series of 4 transfers that beginning with the initial velocity of zero. All of which are found the same way.
At the end of each slope and drop the velocity has to become zero again to roll the opposite way.
½ mint.vint.+ mghint= ½ mfinalvfinal + mghfinal
mgΔh= ½ mfinalvfinal
½ mint.vint=0

7. Second Transfer PE KE
V=0 PE KE
V=0 PE KE
V=0

8. 3rd transfer
The final transfer begins with a golf ball falling from a height and using conservation of momentum through a Newton’s cradle to knock the support from underneath the cup.
mgh=1/2mv2
V1=.94ft/sec
m1v1+m2v2=m1v1’+m2v2’
m1v1= m2v2’

9. Third Transfer PE KE KE
Conservation of Momentum

10. Demonstration

11. Materials Gutter guards Spring plunger 5 golf balls 2 steel balls
Plastic box
Wood
Cost: $19.39 (A on Final Project priceless)

12. Conclusion
After all these exhausting transfers in energy we can sit back and enjoy a refreshing Smoothie.