# Shared Flashcard Set

## Details

Kinematics Vocabulary
The vocabulary of motion.
9
Physics
10/03/2009

Term
 Average Speed
Definition
 Distance traveled divided by time.
Term
 Average Velocity
Definition
 Displacement divided by time; found from the slope between two points on a position time graph.
Term
 Average Acceleration
Definition
 Change in velocity divided by time; found from the slope between two points on a velocity time graph.
Term
 Displacement
Definition
 Change in position.
Term
 Position
Definition
 Where you are relative to the origin.
Term
 Instantaneous Velocity
Definition
 The velocity at one instant in time; found from the slope of the tangent to the position time graph.
Term
 What is the average velocity of a runner who finishes a lap around a 1/4 mile track in 3 minutes?
Definition
 Zero since the displacement is zero.
Term
 What is the average speed of a runner who finishes a lap around a 1/4 mile track in 3 minutes?
Definition
 Average speed is distance divided by time. 1/4 mile divided by 3 minutes = 1/12 of a mile per minute or 5 mph.
Term
 If you drive 30 miles at 60 miles per hour and then slow down to 20 miles per hour for the next 10 miles, what was your average speed?
Definition
 Average speed is distance divided by time. You have driven 40 miles in 1 hour, so your average speed is 40 mph.
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