Team:

Stephanie LongNina WongSara WilsonDiana Shelby

The purpose of our Rube Goldberg machine:› Raise a banner› Trigger another

team’s machine We used materials in

our room and things we found in Estabrook 13 to create our machine. The cost of Bake Me A Cake is approximately $18.65

Bake Me A Cake starts by pulling a string that rotates a wheel with a ball inside. The ball is then released onto a ramp which directs the ball into a cup hanging from a pulley.

The pulley will then trigger two reactions:› Releasing the hinge below the coffee pot to

trigger the blender which will raise the banner.

› Pull the egg beater from beneath the ramp to allow a ball to roll onto another teams machine.

Torque› Wheel› Pulley› Blender› Coffee Pot

Angular Momentum› Coffee Pot› Wheel› Ramp

Projectile Motion› Ball onto ramp› Ball into cup

Center of Mass› Final Ramp

Translational Kinetic Energy› Ball rolling

Linear Momentum (Collision)› Ball into cup ->

inelastic

Translational Kinetic Energy› Ball rolling on ramp› Mgh= ½ mv2

(32.2 ft/s2)(.458 ft.)= ½ v2

V=5.433 ft/s

Torque› Ball, Pulley, and Cup› Torque=Frsin Θ

τ=(.0625lbs)(.0521ft)sin(115˚) τ= .00295 ft-lbs

Problems we came across..› The blender wires connecting to the switch

became undone each time we put it away.› Making sure the wheel turned completely

to drop the ball Building B-MAC was a lot of fun and a

lot of work! But the end result was worth our effort.