Wheels and Axles
Knowledge
An axle is a rod that connects to the centre of a wheel. The kinds of wheels that you find on cars are the most common type of wheels but the wheel and axle are used in many different ways to make work easier for us.
Materials
Procedure
Take the door knob apart and identify the wheel and the axle.
Try turning the axle without the wheel.
Is it easy ? Why ?
Is the wheel fixed or free spinning ?
