Quick Quiz Warm-Up 1. A fork is an example of a: lever wedge wheel and axle 2. A bicycle is an example of a: wheel and axle wedge lever 3. A bathtub is.

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Presentation transcript:

Quick Quiz Warm-Up 1. A fork is an example of a: lever wedge wheel and axle 2. A bicycle is an example of a: wheel and axle wedge lever 3. A bathtub is an example of a/an: pulley screw inclined plane 4. A swivel chair is an example of a: lever screw wedge 5. A teeter totter on the playground is a: lever inclined plane pulley 6. You would use a pulley to: cut food hold pieces of wood together help open and close venetian blinds 7.A hammer is an example of a lever screw wedge

Simple Machines Examples Darren Nigh Science 7

Pulley A pulley is a simple machine that uses grooved wheels and a rope to raise, lower or move a load.

Examples of Pulleys

Lever A lever is a stiff bar that rests on a support called a fulcrum which lifts or moves loads.

Examples of Levers

Wedge A wedge is an object with at least one slanting side ending in a sharp edge, which cuts material apart.

Examples of Wedges

Wheel and Axle A wheel with a rod, called an axle, through its center lifts or moves loads.

Examples of Wheel and Axle

Inclined Plane An inclined plane is a slanting surface connecting a lower level to a higher level.

Examples of Inclined Planes

Screw A screw is an inclined plane wrapped around a pole which holds things together or lifts materials.

The Screw This simple demonstration shows how a screw is actually an inclined plane. Materials Pencil Paper Colored felt tip marker Scissors Procedure 1. Cut a right triangle from the paper. The dimensions should be about 5 inches, by 9 inches, by 10.3 inches. 2. Use the felt tip marker to color the longest edge (10.3 inches) of the triangle. 3. Position the shortest side (5 inches) of the triangle along the side of the pencil and then evenly wrap the paper around the pencil by rolling the pencil.

Illustration of Activity

Examples of Screws

Namethe6 Simple SimpleMachines

Pulley Lever Wedge Wheel and Axle Inclined Plane Screw

Simple Machines Examples The End