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# 8th Unit 4 set A

### Force and Motion Key Terms

TermDefinition
Acceleration the change in velocity of an object over a period of time.
Air Resistance friction of an object through the air.
Speed the rate at which an object covers a distance.
Velocity the rate at which an object covers a distance plus the direction of the object.
Equilibrium a state of rest or balance due to the equal action of opposing forces.
Force an environmental influence on an objectâ€™s motion, direction or state.
Net force the sum of all forces acting upon an object.
Gravity a force of attraction directly proportional to an objectâ€™s mass.
Inertia the natural tendency of an object to remain at rest or in motion.
Momentum the product of mass and velocity.
Normal force a force acting in opposite direction from another force.
Created by: darrin_evans