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Unit 1
Position, Velocity, and Acceleration
18
Physics
09/24/2012

Term
 Detecting motion requires ___________________________
Definition
 a reference point
Term
 What is a reference point?
Definition
 An object that appers to be at rest, that is used to deterine whether another object is moving or not
Term
 When is an object in motion?
Definition
 When it changes position over time
Term
 What is speed?
Definition
 Measurement of how fast an object is going
Term
 What is the equation for speed?
Definition
 S=d/t
Term
 What is the equation for average speed?
Definition
 Ave S=Total d/ Total t
Term
 What is instantaneous speed?
Definition
 how fast something is going at at an instant
Term
 What is velocity?
Definition
 speed and direction
Term
 What is resultant velocity?
Definition
 The combined velocity
Term
 How do you find resultant velocity?
Definition
 1. if the velocities were in the same direction, then add them2. if they are in the opposite direction, then subtract
Term
 What is acceleration?
Definition
 rate at which an object changes its velocity
Term
 How do you accelerate?
Definition
Term
 What isnt acceleration?
Definition
 how much velocity changes. It is the rate.
Term
 What is the equation for acceleration?
Definition
 Ace.=Vf-Vo/t
Term
 What is deceeration?
Definition
 When velocity decreases
Term
 What are the units for velocity?
Definition
 m/s or mi/hr
Term
 What are the units for acceleration?
Definition
 m/s squared
Term
 What is the equation for instantaneous velocity?
Definition
 V=Vo+at
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