are used to : - Tegnologie

The Wheel Although they may seem very different, wheels and gears are closelyrelated to levers. The wheel is essentially a rotating lever. Think of the diagram of thelever above as being bent into a circle. The center of the circle is the fulcrum. In mathwe call this the center point.Wheel "A" is a circle. It is larger than wheel "B". The black circle. You will notice that"A" is larger than "B". The diameter of "A" is larger than "B". If you rotate "B"(theaxle) it will move wheel "A". Since "B" is smaller than "A" and moves in a smallercircle than "A" you will use very little input you get a large output. The large ratio ofthe wheel radius to the axle radius is what makes it easy to turn the wheel at it's rim.34