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# Science Unit 7

TermDefinition
Force a push or a pull exerted on an object; force has size and direction
Static friction the force that resist the start of sliding motion between two surfaces that are contacted and at rest
Kinetic friction the force that opposes the movement of two surfaces that are in contact and are moving over each other
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 an effect
Net Force the combination of all of the forces acting on an object
Inertia the tendency of an object to resist a change in motion unless an outside force acts on the object
Gravity a force of attraction between two 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
Electric Charge a fundamental property that leads to the electric magnetic interactions among particle that make up matter
Static electricity electric charge at rest; generally produce by friction or induction
Electrical conductor a material in which charges can move freely
Electrical insulator a materiel in which charges can not move freely
semiconductor an element or compound that conducts electric current better than an insulator does but not as well as a conductor does.
Created by: ks.28966
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