wedge
moving inclined plane that has one or two sides
screw
inclined plane that is wrapped around a cylinder or tube
lever
plank or board balancing on a rigid rock or a fixed point called a fulcrum
gear
a set of grooved wheels that work together to alter the relation between the speed of the driving mechanism
wheel and axis
two circular objects that have a different diameters that are attached, working together
pulley
a grooved wheel with a rope or cable wrapped around the groove