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Simple Machines

Learn about the different types of simple machines, their definitions, examples, and how they work. Discover how levers, wheel and axles, inclined planes, wedges, screws, and pulleys can make work easier.

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Simple Machines

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  1. Simple Machines A device that does some kind of work for you

  2. Definitions • Motion – movement as a result of some force • Force – A push or pull applied to an object • Work – The application of force to cause an object to move in the direction of the force

  3. Definitions continued: • Load – An external force on an object • Effort – The force that you apply to the machine to move the load or overcome a resistance • Potential Energy – Energy at rest. • Kinetic Energy – Energy in motion.

  4. Lever – parts of a lever • Fulcrum – the point around which a lever turns or pivots • Effort • Load *There are three classes of levers

  5. Class one Lever • The fulcrum is between the effort and the load. • Examples • See-saw • Hammer’s Claw • Scissors • Nail Clippers • Pliers Effort Load Fulcrum

  6. Class Two Lever • The fulcrum is at one end, and the effort is at the other. The load falls in between them. • Examples: • Stapler • Bottle Opener • Wheelbarrow • Nut Cracker Effort Load Fulcrum

  7. Class Three Lever • The fulcrum is at one end on top the effort is next to the fulcrum and the load is on the end. • Examples • Fishing pole • Your arm • Hockey Stick Effort Load Fulcrum

  8. Wheel and Axle • A wheel attached to a smaller wheel or shaft to increase force or speed • Example: • Bicycle wheel • Grindstone • Steering wheel • Gears

  9. Inclined Plane • A plane set at an angle to a horizontal surface forming a ramp. • Example: • Ramp • A Roller coaster • Stairs

  10. Inclined Plane

  11. Wedge • Made up of two inclined planes that form a point. It is used to push an object apart. • Example: • Axe • knife • Doorstop

  12. Screw Machine • An inclined plane that is wrapped around a pole • Example • Drill bits • Bottle cap • C - clamps

  13. Pulley • Uses grooved wheel and a rope to raise, lower, or move a load • Example • Crane • Flag pole • Window blinds • Garage door opener

  14. Pulley

  15. Pulley

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