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SIMPLE MACHINES

SIMPLE MACHINES. 8 th Grade Engineering. Machines. Machines are artifacts that transmit or change the application of power, force, or motion. In other words: Machines change the amount of force needed to do work. “Wouldn’t life be easier if I had a machine?”. Simple Machines.

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SIMPLE MACHINES

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  1. SIMPLE MACHINES 8th Grade Engineering

  2. Machines • Machines are artifacts that transmit or change the application of power, force, or motion. In other words: Machines change the amount of force needed to do work. “Wouldn’t life be easier if I had a machine?”

  3. Simple Machines • How many kinds of simple machines are there? • There are 6 types of simple machines. • What are the 6 types of simple machines?

  4. Levers • Have you used a…. Then you have used a lever!

  5. Levers • A lever has a rod, or bar, (the lever arm) that rests and turns on a support (fulcrum).

  6. Levers • You apply a force to one end of the lever arm to left a load at the other end, allowing you to lift weight more easily.

  7. Levers – Force Multiplier • The closer the fulcrum is to the load, the more ____________ it is to lift.

  8. Levers – Distance Multiplier • The farther the fulcrum is to the load, the _____________ the load can go.

  9. Wheel and Axle • What are some examples of where we use a wheel and axle? • Cars (steering wheels and vehicle wheels) • Bicycles • Ferris Wheels • Wagons • Door knobs

  10. Wheel and Axle • A wheel and axleis a shaft attached to a disk.

  11. Pulleys • Can you make a pulley with the parts of a wheel and axle? • Pulleysare grooved wheels attached to an axle.

  12. Inclined Planes • What is an example of an inclined plane seen in nature?

  13. Inclined Planes • Inclined planes are sloped surfaces used to make a job easier to do. • In what situation is an inclined plane helpful?

  14. Wedges • What are two functions for a wedge? • A wedge is used to split and separate materials and to grip parts.

  15. Screws • Does a screw use an inclined plane? • The screw is an inclined plane wrapped around a shaft. It is used to hold things together.

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