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Motion and Forces

Unit 1, Lessons 1-4

TermDefinition
Position the location of an object
Reference Point a location to which another location is compared
Motion an object's change in position relative to a reference point
Speed the distance traveled divided by the time interval during which the motion occurred
Vector a quantity that has both size and direction
Velocity the speed of an object in a particular direction
Acceleration the rate at which velocity changes over time; an object accelerates if its speed, direction, or both change
Centripetal Acceleration the acceleration directed toward the center of a circular path
Force a push or pull exerted on an object in order to change the motion of the object; force has size and direction
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 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
Created by: 18jparker0218
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