Simple Machines By: Kelsey. Levers A lever is a simple machine that consists of a bar that pivots at a fixed point, called a fulcrum. Levers are used.

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Presentation transcript:

Simple Machines By: Kelsey

Levers A lever is a simple machine that consists of a bar that pivots at a fixed point, called a fulcrum. Levers are used to put force on a load. First Class Lever Fulcrum Input Force Output Force Fulcrum Input Force Output Force Load Output ForceInput Force Load Fulcrum Third Class Lever Second Class Lever

Inclined Plane An inclined plane is a simple machine that is a straight, slanted surface. Using an inclined plane uses less force to move a load than without one.

Wedge A wedge is a double inclined plane that moves. It applies output force greater than your input force.

A screw is an inclined plane that is wrapped in a spiral. When a screw is rotated, a small force is applied along the inclined plane of the screw.

and AxleAxle A wheel an axle is a simple machine consisting of two circular objects of different sizes. When a small input force is applied to the wheel, it rotates through a circular distance. Wheel AxleOutput force Input force

Pulleys A pulley is a simple machine consisting of a grooved wheel that holds a rope or cable. A load is attached to one end of the rope, and an input force is applied to the other end. Movable Pulley Fixed Pulley Output Force Input Force Output Force Input Force

Compound A compound machine is a machine made from two or more simple machines. Machines zipper scissors

Compound Machines Simple Machines Each arm of the scissors is a first class lever. Each sharpened edge of the scissors is a wedge. Lever Wedge

Bibliography All pictures from: Microsoft Office ClipArt

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