Simple Machines are the basis for all mechanical movement.

The Simple Machines are six, basic mechanical devices that are used to apply force
The Six Simple Machines are:

  1. Gears: toothed wheels that mesh together to transmit motion [a form of wheel and axle, as opposed to a wedge which is left out]
  2. Pulley: a wheel with a grooved rim in which a rope or chain can run to change the direction of the pull, to lift a load
  3. Lever: a rigid bar resting on a pivot, used to help move a heavy load with one end when pressure is applied to the other
  4. Wheel and Axle: an axle to which a wheel is fastened so that torque applied to the wheel winds a rope or chain onto the axle
  5. Inclined Plane: a plane that is set at an angle to the horizontal, especially to raise or lower a load by rolling or sliding
  6. Screw: a metal pin or rod with one or more spiraling threads; can be driven as a fastener
These might include:
  • Gears on a bicycle or in another machine (gears)
  • A crane (a pulley)
  • A pair of scissors (a lever)
  • The wheels on a car (a wheel and axle)
  • Tobogganing down a hill (an inclined plane)
  • A table vice (a screw)
  • Museum of SCIENCE!
    Bill Nye - simple machines

    Summary of machines