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Lesson 02 – Inclined Planes at Work

Read About Inclined Planes


Read the vocabulary terms to understand the reading better.

Inclined Plane

An inclined plane can help move heavy objects. A ramp is an example of an inclined plane.


A lever can help move heavy objects such as heavy furniture or a large rock. When one side of a lever gets pushed down, the other side goes up. A seesaw is an example of a lever.


A pulley is a simple machine that has a wheel over which a belt, rope, or chain is pulled to lift or lower an object. You can use a pulley to raise or lower blinds on a window.


A screw is an inclined plane twisted around a rod that can join, cut, lift, or push. A jar lid is an example of a screw.

Simple Machines

Simple machines make work easier and have few or no moving parts.


A wedge is a simple machine that can push things apart by getting in between them. A saw is an example of a wedge. A wedge can also hold things together. A nail or doorstop are examples of a wedge that holds things together.

Wheel and Axle

 A wheel and axle is a simple machine that can move objects across a distance. The wheel is the round part. The axle is the long part.  A car has wheels and axles to help move.

Inclined Planes

Simple machines help you do work. They make work easier. Less push or pull is needed.

A ramp is an inclined plane. It connects a lower place to a higher place. Inclined planes make lifting easier. They are simple machines.

A heavy box can be moved up a ramp and into a truck. Ramps can also help move objects down.

It is difficult to lift a box straight up. Pushing boxes up an inclined plane is easier.

There Are Many Inclined Planes

Cars drive on inclined planes to get to a bridge.

Skateboard ramps are inclined planes.

A ramp for wheelchair users is an inclined plane.

Now Show What You Know!

Complete some questions about the reading selection by clicking “Begin Questions” below.