1.) Inclined plane: A triangle-shaped object for rolling things up instead of carrying them.
Examples: Ramps, slides, and stairs
2.) Wedge: It is created when you combine 2 inclined planes. It is used to split things and separate them.
Examples: Knives, Axe blades, and a pickaxe
3.) Screw: It is a rod with a shaft wrapped around it. It is created when you wrap an inclined plane on a rod.
Examples: Screws, bottle caps, and bolts
4.) Wheel and axle: It is a simple machine that makes things roll. Combine a round flat object with a rod.
Examples: Car wheels, water wheels, and a Ferris wheel
