Simple MachinesSCIENCE NOTES

Lever classes

Wheel and axleA wheel and axle system is made up of a lever that turns in circle that turns in a circle around a fulcrum.

Inclined planesIt is easier to pull or push an object up an inclined plane .The effort required is smaller than pushing or pulling the object vertically upwards . This is because the effort moves the object over a greater distance.

PulleysA pulleys is a wheel with a groove around its edge.

Fixed pulley Movable pulley

GearsGears are wheels with teeth . The teeth of one wheel mesh into the teeth of another so that no slopping occurs.