Child’s Play Team: Emily Curtis Wrinn Diana Shelby
Feb 16, 2016
Child’s Play
Team:Emily Curtis Wrinn
Diana Shelby
Introduction Our Rube Goldberg machine’s purpose
was to not only light up two Jack-O-Lanterns, but to also activate a volcanic island.
We used materials from our rooms and left over
materials from Estabrook 13. Overall materials cost $16.63.
Overview The first step of Child’s Play is a ball rolling
down a ramp which then falls into a plastic cup connected to a pulley.
The pulley triggers two reactions: the release of the hinge below the coffee pot and the pivoting of the sport’s bottle.
These two reactionsproduce the finaloutcome ofChild’s Play.
Engineering Concepts Conservation of Energy
› Ball and Ramp› Mgh= ½ mv2
(32.2 ft/s2)(.458 ft.)= ½ v2
V=5.433 ft/s2
Torque› Pulley, Ball, and Cup› Torque=Frsin(theta)
T=(.0625lbs)(.0521ft)sin(115˚) T= .00295 ft-lbs
Final Words… We started the project Monday afternoon
due to scheduling issues, and it was completed in 2 two-to-three hour periods.
Problems we came across:› We did not account for Center Of Mass when
we initially constructed the sport’s bottle pivot, so we repositioned the pivot point.
› We had to consider Conservation of Momentum in order for the siphoning of water to reach final destination.