Rube Goldburg Sketch up
Description Calculations
The Rube Goldberg Project, (originally designed by Mr. Goldberg, who designed machines in comics) was a demanding experience. It is a contraption that needs at least 15 steps, and has to run for 15 seconds. Each step is only counted if it is an energy transformation, for example a marble hitting a domino. The Rube also had to have at least three simple machines, the ones that we decided on were: pulley, cork screw, and inclined plane. The point of the project was to use calculations dealing with speed, weight and distance, and making it into a real life example. The Rube Goldberg was challenging, stressing your mental ability as well as your patience. However, the project taught me lots about refinement as well as perseverance through stressful situations, giving you an example of a working life in the real world.
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1) Potential Energy= mgh Mass in kg, gravitational
acceleration, height in meters. 0.00523kg x 9.8 g x 0.813 m = 0.041 J Marble rolling from top of Rube to bottom 2) Velocity= d/t Distance/time 0.3937/ 1.05 s =0.37 m/s Marble rolling on track 3) Kinetic energy of a rolling marble 1/2mv2 1/2(mass)(velocity) 2 1/2(0.00597kg)(0.371707m/s) 2 =(1.231)(10)6 (kg)(m/s) 4) Momentum of a rolling marble p=(m)(v) (mass)(velocity) (0.00597kg)(0.371707m/s) =0.0022 m/s 5) Work (Joules) (force)(distance) (3.5N)(0.3302m) =1.1557 J 6) Power (Watts) W/T Work/Time 1.557 J/1.5s =0.77 W 7) Conservation of Momentum (m1)(v1)z(m2)(v2) m1=0.005m/s m2=0.005m/s v1=0.293m/s v2=0.286m/s 8) Hang Time √d/.5g √0.1778m/o.5(9.8) =0.1904 s |