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Chapter 2 Motion

Mrs. Hall's Physical Science

TermDefinition
motion an objects change in position relative to a reference point
frame of reference a system for specifying the precise location of objects in space and time
displacement the change in the position of an object
speed the distance traveled divided by time interval during which the motion occurred. d/t
velocity the speed of object in a particular direction. v/t
acceleration the rate at which velocity changes over time; an object accelerates if its speed, direction or both changes.
force an action exerted on a body in order to change the body's state of rest of motion; force has magnitude and direction.
friction a force that opposes motion between two surfaces that are in contact
static friction the forces resists the initiation of sliding motion between two surfaces that are in contact and at rest.
kinetic friction the force that opposes the movement of two surfaces that are in contact and are moving over each other.
Created by: cmstathulis
 

 



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