# Shared Flashcard Set

## Details

AP B Physics-Chapters 2 and 3
Kinematics (One and Two Dimensions)
11
Physics
11/10/2007

Term
 What is displacement?
Definition
 Displacement is a vector that points from an object's initial position to its final position and has a magnitude that equals the shortest position between the two positions.  Measured in meters (m).
Term
 Average Velocity
Definition
 average velocity=v v=x-x0    t-t0  = Δ x               Δ t
Term
 Average Acceleration
Definition
 Average Acceleration=a a=v-v0    t- t0 = Δ v               Δ t
Term
 Kinematics Equation #1
Definition
 v=v0+at
Term
 Kinematics Equation #2
Definition
 x=½(v0+v)t
Term
 Kinematics Equation #3
Definition
 x=v0t+½at2
Term
 Kinematics Equation #4
Definition
 v2=v02+2ax
Term
 What do objects in free-fall experience?
Definition
 A constant acceleration due to gravity (9.8 m/s2 on Earth) and negligible air resistance.  All objects above the Earth's surface have the same acceleration due to gravity.
Term
 Graphical Analysis of Velocity and Acceleration
Definition
 The slope of a position v. time graph of an object is the object's velocity.  The slope of a velocity v. time graph of an object is the object's acceleration.
Term
 Projectile Motion
Definition
 Projectile motion is an idealized kind of motion that occurs when a moving object experiences only the acceleration due to gravity.  The acceleration is only in the y direction (ay) (ax is always 0). The time to reach maximum height from one point equals the same time for an object to go from the maximum height back to the same point. The speed of a projectile depends only on its height above its launch point, not whether it's moving up or down. The speed of an object at its maximum height is 0 m/s.
Term
 Kinematics in Two Dimensions
Definition
 To put kinematics equations in two dimensions, simply put the values... in the x direction                             x-displacementvx-final velocityv0x-initial velocityax-acceleration in the y directiony-displacementvy-final velocityv0y-initial velocityay-acceleration ...into the kinematics equations.
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