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Per7_over - Preview of Period 7 Simple Machines and...

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Preview of Period 7: Simple Machines and Mechanical Advantage 7.1 Levers How do machines, such as levers, reduce the force needed to lift heavy objects? 7.2 Examples of Levers How does the use of levers make our lives easier? 7.3 Lever Arm Length and Distance Moved How does the length of the lever arm relate to the distance the ends of the arm move? 7.4 How Do Levers Work? Why can we use the length of the lever and load arms to find the forces on the lever? 7.5 Mechanical Advantage What is the theoretical and actual mechanical advantage of a simple machine? 7-1
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Act. 7.1: Levers – Fulcrums and Forces Machines allow you to lift heavy objects easily. You can apply a small force in over a long lever arm to produce a large force out over a short load arm. 7-2 Fulcrum Load Load Arm Lever Arm Force In
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Examples of Levers Pliers Scissors Human Arm Load Arms Fulcrum Lever Arms Fulcrum Lever Arms Variable Length Load Arms Fulcrum Lever Arm Load Arm 7-3
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Act 7.3: Lever Arm Length and Distance Moved What is the relationship between the length of a lever arm and the distance the end of the lever arm moves?
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