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Simple Machines

Discover what machines do for us - changing energy, transferring forces, altering direction and magnitude of force, and adjusting speed. Explore the lever family with its different classes and examples of levers in action.

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Simple Machines

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  1. Simple Machines

  2. What is a machine and what does a machine do for us?

  3. A machine is a device that helps us perform tasks.

  4. 5 Main Functions of Machines • Change Energy from one form into another. • For example an electric generator. • What are the two forms of energy involved in an electric generator? • What are other examples of machines that change energy from one form to another?

  5. 5 Main Functions of Machines • Transfer forces • A car transmission transfers from the motor to the wheels. • What other machines transfer forces?

  6. 5 Main Functions of Machines • Change the direction of a force. • Raise a flag by pulling down on a rope on a flagpole • What other devices change the direction of a force?

  7. 5 Main Functions of Machines • Change the magnitude of a force. • A jack increases the force and allows you to lift a car off of the ground. • What other devices increase the force applied?

  8. 5 Main Functions of Machines • Change the distance or speed. • A bicycle moves the bicycle faster than the pedals are turned. • What other devices increase or decrease the speed?

  9. Families of Machines

  10. Lever Family • A lever is a rigid bar that can rotate freely around a fulcrum. • A tetter-totter is an example of a lever.

  11. Parts of a lever

  12. First Class Lever

  13. Second Class Lever

  14. Third Class Lever

  15. What kind of levers are these?

  16. What kind of levers are these?

  17. What kind of levers are these?

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