A seesaw is a simple machine that falls into the lever category. A lever is a long bar or stick that one pushes or pulls against a fulcrum to move something.
A seesaw is a lever because its base acts as a fulcrum and its plank pivots to move the rider's weight up and down. A simple machine is a basic tool that uses force to make work easier to accomplish. Humans have been using simple machines to assist them for thousands of years. The six categories of simple machines are lever, inclined plane, wheel and axle, screw, wedge and pulley.Learn More
The zipper is a wedge, which is a simple machine that works by putting two inclined planes side by side so that they create a sharp edge. A zipper has two lower wedges that permit it to close and a single upper wedge that allows it to open.Full Answer >
A screwdriver is a type of simple machine. It can be either a lever or as a wheel and axle, depending on how it is used.Full Answer >
A gear is a special type of lever, and is therefore considered a simple machine. The reason a gear is like a lever is due to the teeth in the gear. Each tooth exerts pressure on another, causing the gear to move.Full Answer >
A lever is a simple machine that is made up of a board or bar that rests on an object. Levers are used to achieve a mechanical advantage, such as making lifting heavy objects easier.Full Answer >