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Discover how to build six fundamental mechanisms that create movement: the inclined plane, lever, pulley, screw, wedge, and wheel-and-axle. Each mechanism uses basic principles of physics to generate force in unique ways. Learn how pulleys change the direction of force, how levers amplify power through fulcrum placement, and how each mechanism can be combined for more complex movements. This guide provides insights and resources to help you create your own devices using these simple yet effective mechanisms.
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6 simple mechanisms • Inclined Plane • Lever • Pulley • Screw • Wedge • Wheel and Axle
Pulley • A pulley is a rope wrapped around a wheel. It changes the direction of force. A basic compound pulley has a rope attached to a stationary point looped around one wheel and then around a second wheel. Pulling on the rope pulls the two wheels closer together.
lever The lever has two important parts. The lever itself and the fulcrum. The placement of the fulcrum determines how far the levered object will move, and how much force is required to move it. If a weight was resting on a lever a person could lift the weight by pressing on the lever on the other side. The farther away from the fulcrum that person pressed, the less force that person would need to apply. In order to lift the weight the same distance, the force would have to be applied over a longer distance. In science, we call how much effort it takes to move something a certain distance "work." With a lever, you always do the same amount of work no matter how long your lever is. But if you are moving the lever further, then you don't have to push as hard to do the same amount of work.
Crank and slider • http://www.wikihow.com/Build-a-Crank-and-Slider-Mechanism
Crank • http://makeprojects.com/Project/Bent-Wire+Crank+Toy/1986/1 • http://www.youtube.com/watch?v=tivQavW_Gio
Simple motor • http://www.youtube.com/watch?feature=endscreen&v=oRSU4FnUSrA&NR=1
Simple mechanisms (or so they say!) • http://www.buzzhunt.co.uk/2009/06/12/simple-mechanisms-explained/ Intense!: • http://www.cs.cmu.edu/~rapidproto/mechanisms/chpt2.html
Combining simple mechanisms to create movement! • http://www.techcardtechnology.com/TechCard_Kits/downloads/pdf_downloads/new_techcard/starter_kits/01_NTC_SImp_Mech_SK.pdf