SIMPLE MACHINES

INCLINED PLANE

• Flat surface
• When slanted, move objects
• Ex: ramps, staircases

WEDGE

• A type of inclined plane
• Pushes things apart
• Edge of a smooth surface
• Ex: axe, knife

SCREW

• Inclined plane wrapped around a cylinder
• Holds things together
• Every turn helps move a piece of metal through an object

LEVER

• Pries things loose
• An arm that pivots against fulcrum
• Ex: seesaw, crowbar
• 3 types: 1st, 2nd, & 3rd Class-depends where fulcrum is

WHEEL & AXLE

• Many levers put together
• Carries objects through a distance
• Wheel turns axle causing movement

PULLEY

• Similiar to a wheel & axle
• Cord wraps around wheel
• Cord moves direction
• Raise and lower objects
• Ex: flagpole