Quick Quiz Warm-Up1. 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 Simple Machines ExamplesExamples

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

LeverLever

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

Examples of LeversExamples of Levers

WedgeWedge• A wedge is an object with

at least one slanting side ending in a sharp edge, which cuts material apart.

Examples of Wedges Examples of Wedges

Wheel and AxleWheel and Axle

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

Examples of Wheel and Axle

Inclined PlaneInclined Plane

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

Examples of Inclined Planes Examples of Inclined Planes

Examples of Inclined PlanesExamples of Inclined Planes

ScrewScrew

• 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 Procedure1. 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 ScrewsExamples of Screws

Name Name

the the

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Simple Simple

MachinesMachines

Pulley

Lever

Wedge

Wheel and Axle

Inclined Plane

Screw

Simple MachinesSimple Machines

ExamplesExamples

The EndThe End