Simple Machines

Simple machines are basic mechanical devices that help make work easier by allowing us to apply force in a more effective way. They include the lever, wheel and axle, pulley, inclined plane, screw, and wedge.

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.

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.

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.

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.

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

Mechanical advantage is a measure of the force amplification achieved by using a tool, mechanical device, or machine system. It is the ratio of the output force to the input force.

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

Scissors use a wedge and a lever as their simple machines.