How Einstein and Newton Help You Out
Posted in Technology, Theory on June 26th, 2011 by admin – Be the first to commentThe laws of Physics explain all that goes on around you in the most simple (or as we figure out in college, intensely complicated) method. The laws of Physics are your sharpest tools to build a successful Rube Goldberg Machine. The two that you will need the most are Gravity and Momentum. They will often go hand-in-hand to work against each other, to make your machine carry the connecting elements, or as I call them, the ‘Travelers’, across the machine and towards the final goal. Remember these basic rules:
•Gravity will pull the traveler down, it will build ‘Momentum’, and will then work against ‘Gravity’ itself to climb up. Use this to knock through a barrier or initiate a new traveler, or to help the traveler climb up towards the next part of the machine.
•It may be useful to know that
◦Momentum = Mass × Velocity
◦Potential Energy = Mass × Height of the traveler above the base level × Acceleration due to gravity
◦Kinetic Energy = (Mass × Velocity2 ) ÷ 2.
Use these and a few trial runs to perfect each part and make a Rube Goldberg Machine.
Dissecting a Rube Goldberg Machine
If you will examine each moving mechanism of a Rube Goldberg Machine, you will notice that there are three vital ones – the pulley, the dominoes, and a ball as a traveler. Using the proper counter-weight, the pulley is excellent for pulling your traveler up or gently letting it slide down. For example, a traveler will land in a cup, act as the counter-weight, and pull the new traveler, which is kept in the other cup, upwards. The cup may be positioned such that on reaching the top floor, the cup will tilt and slide the traveler onwards. Dominoes will always be found in a Rube Goldberg Machine. They are difficult to put up, but highly rewarding to be brought down with accuracy. Face it, it’s just fun to watch a length of dominoes collapsing and cascading! Dominoes may be curled around the machine. You can also use pivots or levers so that the last domino that falls from one stack will hit the lever, which will rotate around a pivot and knock down the second stack. The ball is the most widely used traveler you will see, and for very logical reasons. It’s round, moves fast enough to provide good momentum, can move around inside tracks or grooves, and all that. So whenever in doubt, throw a ball in the thing.