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Matter In Motion

Core Knowledge

A. MOTION

•Velocity and speed
The velocity of an object is the rate of change of its position in a particular direction. Speed is the magnitude of velocity expressed in distance covered per unit of time. Changes in velocity can involve changes in speed or direction or both.

• Average speed = total distance traveled divided by the total time elapsed Formula: Speed = Distance/Time (S = D/T)
Familiar units for measuring speed: miles or kilometers per hour

 

Author: Marilyn Knapp
Last modified: 6/27/2015 6:55 AM (EDT)