Types of Levers - Free Worksheet and Lever

 

This video explains levers, a type of simple machine, and introduces a mnemonic device to help remember the three classes of levers.

What is a lever?

A lever consists of three parts:

Fulcrum (pivot point)

Force/Effort (applied input)

Load (what is being moved)

The placement of these parts determines the class of lever.

The Three Classes of Levers:

First-Class Lever:

Fulcrum in the middle

Example: Seesaw, scissors, pliers

Second-Class Lever:

Load in the middle

Example: Wheelbarrow, nutcracker, stapler

Third-Class Lever:

Effort in the middle

Example: Hockey stick, rake, hammer

Mnemonic Device:

Use the letters FLE (Fulcrum, Load, Effort) and write numbers 1 2 3 below them:

F → 1st class → Fulcrum in the middle

L → 2nd class → Load in the middle

E → 3rd class → Effort in the middle

Hope this helps you remember which part is central in each class of lever.

Free Lever Worksheet

Lever Worksheet Answer Key

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