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# 5th SimpleMachines_6

### 5th Grade Science - Simple Machines_Terms

TermDefinition
Work When a force acts on something over a distance, either to life it or to overcome resistance
Simple Machine Basic devices that provide mechanical or other advantage
Pulley A wheel with a grooved rim in which a rope/wire can run to change the direction of the pull (force) while lifting a load
Fixed Pulley Has a wheel that is attached to something above the load - fixed pulleys give a directional advantage
Moveable Pulley Had a wheel that is attached to something above the load - movable pulleys give mechanical advantage
Directional Advantage A change in direction that results from putting a rope through a fixed pulley
Mechanical Advantage Reduces the effort (force) needed to lift a load or overcome a resistance - moveable pulleys give a mechanical advantage
Force A push or pull exerted on an object - sometimes called effort
Friction A force that resists motion between two objects in contact
Gravity The natural force that attracts any two objects with mass toward each other
Created by: RoperFive
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