Transcription of Introduction to Mechanisms and Machines - Make
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Introduction to Mechanisms and Machines - Make
1 Introduction toMechanisms andMachinesVirtual/ Making Things Move: DIY Mechanisms for Inventors, Hobbyists, and Artists / Roberts / 167-4 / Blind :\010 Comp\Virtual\167-4\ , October 19, 2010 3:27:07 PMColor profile: DisabledComposite Default screenMechanical systems come in many shapes and forms, and they have variousdefinitions. Before we can start making Machines , we need to know whatwe re talking about: Amechanismis an assembly of moving parts. Amachineis any device that helps you do work, from a hammer to a hammer is a machine because it makes your arm longer, so you can this book, we use the mechanical definition of work:Work=Force DistanceForce(F) equalsmass(m) timesacceleration(a), and is written asF=ma(also knownas Newton s second law).
Fulcrum (pivot point) 2. Input (effort or force) 3. Output (load or resistance) First Class Levers In a first class, or simple, lever, the fulcrum is between the input and output. This is the classic seesaw most people think of when they hear the word lever, as shown in Figure 1-1. Things can balance on a seesaw in three ways: 1.
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