This is an inclined plane. An inclined plane is a slanting surface that connects a lowersurface to a higher surface. A real-world example of an inclined plane is a wheelchairramp. A wheelchair ramp makes it easier to transport wheelchairs by giving them a flatsurface instead of stairs.
This is a lever. A lever is a board that pivots on a fulcrum. A lever pulls up and down bygentle force. The example of a lever is a seesaw. A seesaw has one person on each sideof it. The fulcrum shifts the weight so it goes up and down easily.
This is a pulley. A pulley is a wheel that pulls things up or down by using a rope. The real-world example of a pulley is a flagpole. The pulley makes this work easier by omitting theperson having to climb up the pole to pull the flag up or push it down.
This is a screw. A screw is an inclined plane wrapped around a cylinder which helps us byholding things together. The real-world example of a screw is a lightbulb. A lightbulb hasa screw at the bottom. This makes the work easier by holding the lightbulb in place.
This is a wedge. A wedge is two inclined planes back-to-back which can be used to divide(like a knife) and stop (like a door wedge). The real-world example of a wedge is a doorwedge. It makes work easier by holding the door open so no one has to physically hold itby wedging itself in-between the door and the floor so that the door does not swingclosed.
This is a wheel and axle. A wheel and axle is a wheel with a rod through it. The real-worldexamples of a wheel and axle that we show here are the wheels on a motorcycle and thedumbbell. The wheels on the motorcycle make riding it easier by rolling so that themotorcycle moves.