are used to : - Tegnologie

Mechanical AdvantageWhen two gears are meshed, as in thediagram on the right, they act in a similarfashion to levers. Each gear tooth can beregarded as the end of a lever with thefulcrum placed at the centre of the gear. Thelonger lever "A" is, the greater the force thatis applied to the shaft of the follower.We can make lever "A" longer by usinggears with a greater number of teeth.We can also make lever "B" smaller,therefore increasing the force exerted at theend of the lever.Gears do not only increase speed andchange the direction of motion but canmultiply turning forces.42