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Simple Machines Glossary

Force

Physical effort applied to or against an object

Mechanical Advantage

How effective a technology or machine is; equal to load/effort

Fulcrum

An object used to turn a lever

Torque

Turning effect of force on an object

Axle

A fulcrum of a round object (eg wheel or doorknob)

Speed Multiplier

A class 3 lever; used to increase the speed at which the load travels. (Small distance but larger effort)

Force Multiplier

A lever used to reduce the effort of moving a load

Pulley

A machine used to reduce the effort of lifting an object by changing the direction of the effort force

Efficiency

The ability to do something well without wasted resources

Acceleration

The rate at which an object increases speed

Newton

The SI Unit for Force

Boomerang

A weapon consisting of a curved piece of wood designed to return to the thrower

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