The zipper is a wedge... your welcome everyone who needed it(:
A zipper is best classified as a type of mechanical fastener rather than fitting neatly into the categories of lever, pulley, ramp, screw, wheel, or wedge. However, it does function similarly to a wedge because the interlocking teeth of the zipper create a secure closure when pulled together. In essence, while it utilizes mechanical principles, a zipper is unique in its design and function.
Wedge
Wedge
A broom is a wedge
The original six are the lever, wheel and axle, inclined plane, wedge, screw, and pulley.
The Pulley is one of them. Wheel and axle. lever. screw. wedge. inclined plane.
wedge lever
wedge is another simple machine kind of lever
Inclined plane
pulley,lever,screw,inclined plane,wedge,wheel and axle.
A stapler is a compound machine. It is made up of a lever and a wedge.
Eight types of simple machines are wheel & axel, pulley, lever, screw, wedge, inclined plane, gears, and screw