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.

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