Simple Machines

Front

What are simple machines?

Back

Simple machines are basic mechanical devices that help make work easier by allowing us to apply force in a more effective way. They include levers, pulleys, inclined planes, wedges, screws, and wheel and axles.

Front

What is a lever?

Back

A lever is a simple machine that consists of a rigid bar that pivots around a fixed point called the fulcrum. It is used to lift or move loads with less effort.

Front

What is a pulley?

Back

A pulley is a simple machine that consists of a wheel on an axle or shaft designed to support movement and change the direction of force. It is often used to lift heavy objects.

Front

What is an inclined plane?

Back

An inclined plane is a flat surface that is tilted at an angle to help raise or lower objects. It reduces the amount of force needed to lift an object by spreading the effort over a longer distance.

Front

What is a wedge?

Back

A wedge is a simple machine that consists of two inclined planes joined together. It is used to split, cut, or separate objects.

Front

What is a screw?

Back

A screw is a simple machine that consists of a cylindrical shaft with a helical ridge (thread) wrapped around it. It converts rotational motion into linear motion and is used to hold objects together or lift materials.

Front

What is a wheel and axle?

Back

A wheel and axle is a simple machine that consists of a larger wheel attached to a smaller axle. When the wheel turns, the axle turns as well, allowing for easier movement of objects.

Front

How do compound machines work?

Back

Compound machines are made up of two or more simple machines working together to make work easier and increase mechanical advantage.

Front

What is mechanical advantage?

Back

Mechanical advantage is the ratio of the output force produced by a machine to the input force applied. It measures how much a machine multiplies force.

Front

Give an example of a compound machine.

Back

A pair of scissors is an example of a compound machine, as it combines two simple machines: a lever and a wedge.