An in-depth explanation of the wheel and axle from Scholastic. Also provides several examples and a picture for understanding.

A lab investigation of an accelerating object can be difficult without motion sensors or computer photogates. The accelerating object can gain velocity in such a way that it moves a great distance in a short time.

This lesson will explain how to calculate the mechanical advantage of a wheel and axel. It is 1 of 2 in the series titled "Simple Machines: Wheel and Axel."

This lesson will explain how to calculate the mechanical advantage of a wheel and axel. It is 2 of 2 in the series titled "Simple Machines: Wheel and Axel."

An encyclopedia article from Wikipedia on the wheel discusses how wheels operate and travel on surfaces, and gives information on the invention and use of the wheel in ancient times. Links are also provided for additional information.

Several good activities here. Look particularly at Wheel Figure It Out (which is the opening page) and Gearing Up. There are answers to the very good questions at the bottom of each.

A slideshow and a short quiz on simple machines and how they reduce the amount of work or effort needed to complete a task.

Simple machines are devices with few or no moving parts that make work easier, and which people have used to provide mechanical advantage for thousands of years. Students learn about the wedge, wheel and axle, lever, inclined plane,...

Through a five-lesson series with five hands-on activities, students are introduced to six simple machines - inclined plane, wedge, screw, lever, pulley, wheel-and-axle - as well as compound machines, which are combinations of two or...

Refreshed with an understanding of the six simple machines; screw, wedge, pully, incline plane, wheel and axle, and lever, student groups receive materials and an allotted amount of time to act as mechanical engineers to design and...

A thorough discussion of all the simple machines, beginning with some thoughts on mechanical advantage and conservation of energy. Very complete. Move down to the section that interests you.

Provides definitions of all 6 simple machines with examples and student drawing of them. Interactive "simple machines quiz" at the end.

In this problem solving exercise, students must decide which simple machine would work best in different situations, in order to help the principal manoeuvre himself after he has hurt his leg and can't walk. The site has a good tutorial...

Identify the six simple machines by dragging the correct term, and dropping it onto the associated simple machine.

This lesson will introduce the six types of simple machines and show how machines can increase efficiency by reducing work input needed. It is 2 of 2 in the series titled "Simple Machines."

This lesson will introduce the six types of simple machines and show how machines can increase efficiency by reducing work input needed. It is 1 of 2 in the series titled "Simple Machines."

With-it explanation of how the pulley works, where it's found. Most interesting, as Scholastic material usually is.

A cart or wagon. It had commonly two wheels, but sometimes four, and it was then called the plaustrum majus. Besides the wheels and axle the plaustrum consisted of a strong pole (temo), to the hinder part of which was fastened a table of...

This site provides a chart that lists the six simple machines, defines them, explains how it helps and gives examples.