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Lever

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A 3D illustration showing how levers work, a basic principle of simple machines in physics.

What is a Lever?

A lever is a simple tool that helps us do things more easily. It is made from a strong stick or bar that turns around a fixed point called a fulcrum. Levers are one of the six basic tools scientists discovered a very long time ago.

How Do Levers Work?

Levers help us lift heavy things or move objects with less effort. This happens because the lever lets us push a little farther to use less strength. When we push one end of the lever, the other end moves. This makes it easier to do things like open a can or cut something with scissors.

Fun Facts About Levers

Levers have been used for thousands of years. People in ancient Egypt used them to lift big stones for buildings. The smart man named Archimedes once said, โ€œGive me a lever long enough and a place to stand, and I shall move the world.โ€ This shows how powerful levers can be! There are three types of levers, and we see them in tools like seesaws, wheelbarrows, and tweezers.

Images

Diagram showing the three different classes of levers and examples of each type.
An old engraving showing Archimedes' lever, a simple machine used to demonstrate mechanical advantage.

Related articles

This article is a child-friendly adaptation of the Wikipedia article on Lever, available under CC BY-SA 4.0.

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