MACHINES Devices that make work easier by changing the size and/or the direction of the force. They will not do work for you.

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Presentation transcript:

MACHINES Devices that make work easier by changing the size and/or the direction of the force. They will not do work for you.

Machines that can do a task with one single movement. SIMPLE MACHINES Machines that can do a task with one single movement.

SIMPLE MACHINES Lever Pulley Wheel and Axle Inclined Plane Screw Wedge

Lever A simple machine consisting of a bar that is free to pivot (rotate) around a fixed point called the fulcrum. Ex: scissors, crowbar

Pulley A simple machine consisting of a grooved wheel with a rope running along the groove. Ex: flagpole

Wheel & Axle A simple machine consisting of two different sized wheels that rotate together. Ex: door knob, steering wheel

Inclined Plane A simple machine consisting of a sloping surface or ramp used to raise objects. Ex: loading ramp

Inclined Planes Mountain roads are inclined planes so that cars don’t have to climb straight up. A definite advantage! Also, think about parking garages.

Screw A simple machine consisting of a special type of inclined plane wrapped in a spiral around a cylindrical post. Ex: spiral staircase, screw

Wedge A simple machine consisting of a moving inclined plane with one or two sloping sides. Ex: knife, chisel

Compound Machines A compound machine is a combination of several simple machines. Ex: bicycle

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