Advertisement.

EnchantedLearning.com is a user-supported site.
As a bonus, site members have access to a banner-ad-free version of the site, with print-friendly pages.
Click here to learn more.

ad
(Already a member? Click here.)

Our subscribers' grade-level estimate for this page: 3rd - 4th

EnchantedLearning.com
Levers: Simple Machines
Zoom Astronomy

Levers are one of the basic tools that were probably used in prehistoric times. Levers were first described about 260 BC by the ancient Greek mathematician Archimedes (287-212 BC).

A lever is a simple machine that makes work easier for use; it involves moving a load around a pivot using a force. Many of our basic tools use levers, including scissors (2 class 1 levers), pliers (2 class 1 levers), hammer claws (a single class 2 lever), nut crackers (2 class 2 levers), and tongs (2 class 3 levers).


A Type 1 Lever.

A Type 2 Lever.

A Type 3 Lever.




A Type 1 Lever.
In a Type 1 Lever, the pivot (fulcrum) is between the effort and the load. In an off-center type one lever (like a pliers), the load is larger than the effort, but is moved through a smaller distance.

Examples of common tools (and other items) that use a type 1 lever include:

Item Number of Class 1 Levers Used
see-saw a single class 1 lever
hammer's claws a single class 1 lever
scissors scissors 2 class 1 levers
pliers pliers 2 class 1 levers




A Type 2 Lever.
In a Type 2 Lever, the load is between the pivot (fulcrum) and the effort.

Examples of common tools that use a type 2 lever include:

Item Number of Class 2 Levers Used
stapler a single class 2 lever
bottle opener a single class 2 lever
wheelbarrow a single class 2 lever
nail clippers Two class 2 levers
nut cracker Two class 2 levers




A Type 3 Lever.
In a Type 3 Lever, the effort is between the pivot (fulcrum) and the load.

Examples of common tools that use a type 3 lever include:

Item Number of Class 3 Levers Used
fishing rod a single class 3 lever
tweezers Two class 3 levers
tongs Two class 3 levers





Enchanted Learning®
Over 35,000 Web Pages
Sample Pages for Prospective Subscribers, or click below

Overview of Site
What's New
Enchanted Learning Home
Monthly Activity Calendar
Books to Print
Site Index

K-3
Crafts
K-3 Themes
Little Explorers
Picture dictionary
PreK/K Activities
Rebus Rhymes
Stories
Writing
Cloze Activities
Essay Topics
Newspaper
Writing Activities
Parts of Speech

Fiction
The Test of Time
iPhone app
TapQuiz Maps - free iPhone Geography Game

Biology
Animal Printouts
Biology Label Printouts
Biomes
Birds
Butterflies
Dinosaurs
Food Chain
Human Anatomy
Mammals
Plants
Rainforests
Sharks
Whales
Physical Sciences: K-12
Astronomy
The Earth
Geology
Hurricanes
Landforms
Oceans
Tsunami
Volcano
Languages
Dutch
French
German
Italian
Japanese (Romaji)
Portuguese
Spanish
Swedish
Geography/History
Explorers
Flags
Geography
Inventors
US History

Other Topics
Art and Artists
Calendars
College Finder
Crafts
Graphic Organizers
Label Me! Printouts
Math
Music
Word Wheels

Click to read our Privacy Policy

E-mail




Enchanted Learning Search

Search the Enchanted Learning website for:



Advertisement.



Advertisement.



Advertisement.






Copyright ©2000 EnchantedLearning.com ------ How to cite a web page