Rube Goldberg Machine Team #5 Brent Beatty, Rosie West, George Wheeler, Htun Win and Nia Zacharia Rube Goldbergs Inventions Rube Goldberg drew his "Inventions" in order to satirize the new technology and gadgets of the day. His drawings, using simple household items, were incredibly complex and wacky, yet somehow (perhaps it was because Rube was a graduate engineer) the "Inventions" always finished their task. Rube Goldberg Machine Named after, and inspired by the cartoonist Reuben Lucius Goldberg, a Rube Goldberg Machine brings the ideas of the Pulitzer Prize- winning artists "Invention" cartoons to life. Our Rube Goldberg Machine Turns off an alarm clock through the use of Springs Friction Projectile Motion Angular Momentum Work-Energy Our Rube Goldberg Machine Release ball and cart The ball releases a weight that turns on the motor The motor spins and triggers both ball launcher and spring The spring turns of motor Ball launcher turns off alarm Work-Energy mgh 1 +.5mv 1 ^2 = mgh 2 +.5mv 2 ^2 Using the work-energy equation Mass of cart = 4.23/32.2 slugs or 1.98 kg h 1 = 1.98 ft or.604 m Since both the ball and the cart are initially at rest mgh 1 = mgh 2 +.5mv^2 The velocity of the ball is 5.81 ft/s or 1.77 m/s. The velocity of the cart is 5.81 ft/s or 1.77 m/s. Note: The ball will finish just before the cart in our machine!!! Mass of ball =.20/32.2 slugs or.0907 kg h 2 = 1.46 ft or.445 m Springs The spring constant k was determined to be 7.74 in-lb. If a force F of 26.0 lbs is required to turn off the motor, and the motor is located 20.5 inches above the uncompressed spring, how many inches must the spring be compressed? Use the following equation.5kx^2 = mgh + F where m =.160/32.2 slugs The spring must be compressed 2.75 inches. Other Ideas Considered Rube Goldberg Machine: sinking a boat, raising a flag Catapult The End