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# 7.1-3 vocabulary

TermDefinition
Force A push or pull exerted on an object in order change motion of the object; force has size and direction.
Static Friction The force that resists the start of sliding motion two surfaces that are in contact and at rest.
Kinetic Friction The energy of an object that is due to the object's motition.
Drag A force parallel to the velocity of the flow; It opposes the direction of an aircraft and, in combination with thrust, determines the speed of the aircraft.
Field Any region in which a physical force has effect.
Net Force The combination of all of the force acting on an object.
Inertia The tenency of an object to resist a charge in motion unless an outside force acts on the object.
Gravity A force of attraction between objects that is due to their masses.
Free Fall The motion of a body when only the force of gravity is acting on the body.
Orbit The path that a body follows as it travels around another body in space.
Static Electricity Electric charge at rest; genrally produced by friction or induction.
Semiconducter An element or compound that conducts electric current better than an insulator does but not as well as a conductor does.
Electric charge A fundamental property that leads to the electromagnetic interactions among particles that make up matter.
Electrical Conducter A material in which charges can move freely.
Electrical insulator A material in which charges cannot move freely.
Created by: rl.6797

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