8.1 Motion “reference frame” – more commonly called “ frame of reference” Motion is related to some stationary (unmoving) object, called the frame of reference. city/relativeVelocity.html

Change in Position When we describe “motion”, we relate it in terms of some frame of reference that is not moving – Ex. She drove 3 miles away from my house. Move the pencil (from where it is now) 4 centimeters to the left.

Motion or Movement is a Change In Position Called Displacement 10 ft. Position A Position B

Speed is the Rate of Displacement 10 ft. Position A Position B 10 0 Seconds

Speed Equations A simple and useful version of the Speed Equation Looks Like This

If You Want to Know the Distance Traveled You Can Rewrite the Equation Like This

“Speedometer”

Travel at a constant speed

Changing speeds

Position-Time Graphs Distance in Feet Time in Seconds Describes the Rate of Change in Position of an Object Over Time Distance (ft) Vs. Time (sec.) DistanceTime

Velocity is the Rate of Displacement in a Specified Direction 10 ft. Position A Position B 10 0 Seconds East South West North

Momentum Product of an object’s mass and its velocity.