4th Grade Simple Machines

Front

What is a simple machine?

Back

A simple machine is a device that makes work easier by allowing us to push or pull in a more efficient way.

Front

What are the six types of simple machines?

Back

The six types of simple machines are lever, wedge, screw, pulley, inclined plane, and wheel and axle.

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.

Front

What is a wedge?

Back

A wedge is a simple machine that is used to split or cut objects apart, like an ax or a knife.

Front

What is a screw?

Back

A screw is a simple machine that is an inclined plane wrapped around a cylinder, used to hold things together or lift objects.

Front

What is a pulley?

Back

A pulley is a simple machine that uses a wheel and a rope to lift or lower 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.

Front

How does a lever work?

Back

A lever works by using the fulcrum to change the direction of the force applied, making it easier to lift heavy objects.

Front

What is an example of a lever in everyday life?

Back

A seesaw is an example of a lever, where two people can balance and lift each other by pushing down on opposite ends.

Front

What is the purpose of a wedge?

Back

The purpose of a wedge is to convert a force applied to its blunt end into a force perpendicular to its inclined surfaces, effectively splitting or cutting.