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

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.)

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.

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

Step 1 KE PE

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

Second Transfer PE KE V=0 PE KE V=0 PE KE V=0

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’

Third Transfer PE KE KE Conservation of Momentum

Demonstration

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

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