Wheel+and+Axle

A wheel and axle is another type of simple machine. An axle is a rod that goes through the wheel. The axle helps the wheel turn. Wheels and axles make things easier to move.
 * What is a wheel and axle? **

doorknob, large pipe valve, tractor wheel, pencil sharpener, fishing rod and reel
 * Some examples of a wheel and axle: **


 * Check out this video clip to help you understand how this machine makes work easier. **

http://www.schooltube.com/video/3a6aa2b680e949388453/The-Wheel-and-Axle-Movie

