Simple Machines

Front

What is a simple machine?

Back

A simple machine is a device that makes work easier by allowing us to apply force in a more effective way. Examples include levers, pulleys, wedges, screws, inclined planes, 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.

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What is a wedge?

Back

A wedge is a simple machine that is used to split, cut, or divide objects. It has a thick end and a thin edge, allowing it to exert force over a small area.

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 force into linear motion and is used to hold objects together.

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 increasing the distance over which the force is applied.

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 heavy loads.

Front

How does a wedge work?

Back

A wedge works by converting a force applied to its thick end into a force that is directed outward at its thin edge, allowing it to split or cut through materials.

Front

What are two examples of a pulley?

Back

Two examples of a pulley are a flagpole hoist and window blinds.

Front

How does a pulley make work easier?

Back

A pulley makes work easier by changing the direction of the input force and allowing for a greater mechanical advantage.