PLTW Levers

Levers

Pages 170-171

​Lesson objectives:

• ​Describe what a lever is

• ​Describe how we use levers

​Key words:

• ​levers

• ​turning effect

• ​turning force

• ​effort

• ​load

• ​pivot(fulcrum)

• ​force multiplier

• ​distance multiplier

​Levers

• ​We use levers to move objects that are too heavy to lift on their own.

• ​A lever is a bar that can turn when you exert a force on one end.

​

​More examples of levers

Open Ended

Give more examples of levers.

NOTE: You may use internet.

Draw

Show the effort, pivot(fulcrum), and the load in the picture on the left. You may draw on the image.

​More about levers

• ​The lever is a force multiplier because it makes the effect of the force that you exert much bigger.

  Some objects are used as distance multipliers. A distance multiplier is a tool that increases the distance moved by a force.

  About Force Multipliers