Child’s Play

1. Child’s Play Team: Emily Curtis Wrinn Diana Shelby

2. 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.

3. 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 reactions produce the final outcome of Child’s Play.

4. 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

5. 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.