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Motion and forces

Unit 1 lessons one through four

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; and object accelerates if it's speed, direction, or both changes
Centripetal acceleration The toward directed toward the center of a circular path
Force A push or a pull exerted on an object in order to change the motion n unless an outside force acts on the objectthe 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 objectthe object
Gravity A force of attraction between objects that is due to their masses
Free Fall The motion of a body when only thee force of gravity s acting on the body
Orbit The path that a body follows as it travels around another body in space
Created by: TreReese
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