9887

Three Classes of Levers

The lever is a simple machine that provides mechanical advantage to magnify the force necessary to overcome a resistance. Levers were known to the ancient Greeks, having been described by Archimedes in the Third Century BCE. Three classes of lever differ in their configuration of the fulcrum, load, and force, shown as a blue triangle, black weight, and red arrow, respectively. Class 1 levers have the fulcrum in the central position, with the force applied at one end to move the load at the other end in the opposite direction. Examples are scissors and pliers (actually both double levers), crowbars, claw hammers (when used to pull out nails), and seesaws. Class 2 levers have the load in the central position with the force at one end making it move the same direction around the fulcrum at the opposite end. Examples are the nutcracker (again a double lever) and wheelbarrow. Class 3 levers apply the force in the central position, again to impel the load in the same direction, for example, baseball bats, tennis rackets, human arms, tweezers, and doors.
In this Demonstration, you can choose one of the three classes of levers and simulate its operation. A real-life realization of each type is also illustrated.

SNAPSHOTS

  • [Snapshot]
  • [Snapshot]
  • [Snapshot]
    • Share:

Embed Interactive Demonstration New!

Just copy and paste this snippet of JavaScript code into your website or blog to put the live Demonstration on your site. More details »

Files require Wolfram CDF Player or Mathematica.









 
RELATED RESOURCES
Mathematica »
The #1 tool for creating Demonstrations
and anything technical.
Wolfram|Alpha »
Explore anything with the first
computational knowledge engine.
MathWorld »
The web's most extensive
mathematics resource.
Course Assistant Apps »
An app for every course—
right in the palm of your hand.
Wolfram Blog »
Read our views on math,
science, and technology.
Computable Document Format »
The format that makes Demonstrations
(and any information) easy to share and
interact with.
STEM Initiative »
Programs & resources for
educators, schools & students.
Computerbasedmath.org »
Join the initiative for modernizing
math education.
Step-by-step Solutions »
Walk through homework problems one step at a time, with hints to help along the way.
Wolfram Problem Generator »
Unlimited random practice problems and answers with built-in Step-by-step solutions. Practice online or make a printable study sheet.
Wolfram Language »
Knowledge-based programming for everyone.
Powered by Wolfram Mathematica © 2014 Wolfram Demonstrations Project & Contributors  |  Terms of Use  |  Privacy Policy  |  RSS Give us your feedback
Note: To run this Demonstration you need Mathematica 7+ or the free Mathematica Player 7EX
Download or upgrade to Mathematica Player 7EX
I already have Mathematica Player or Mathematica 7+