Vectors
Review: Vectors vs. Scalars
Scalar:
described by a value w/ units
can be
Examples: mass, time, speed
Vector:
described by a value w/ units and direction
magnitude: length of vector or
Examples: position, displacement, velocity,
acceleration,
Practice test 2 Fall 16
Exam 2 Friday Oct 21 5:30pm to 7:30pm
Test 2 reading material: Section 25.5, Ch 26, Ch 27, Ch 28
and Ch 29
1. Three equal negative point charges are placed at three of the corners of a square of side d as
shown in the figure. Which
DESCRIBING MOTION IN 1D
(1D KINEMATICS)
August 26th, 2016
Instructor: Dr. Travis Merritt
Review
Review
Instantaneous Velocity
Velocity to Position
Acceleration
Suppose Kevin is trying to get back home after being
downtown for most of the night. He is unsu
FREE FALL
September 2nd, 2016
Instructor: Dr. Travis Merritt
Review
Review
Free Fall
A cars motion with respect to the ground is described by
the following function:
x(t) = (48 m) + (12 m/s)t + (2 m/s2 )t2
Mike says that its original position is (48 m) an
MOTION DOWN INCLINES AND VECTOR
COMPONENTS
September 7th, 2016
Instructor: Dr. Travis Merritt
Review
Review
Review
Review
Motion down Inclines
Component Vectors
Suppose you want to hit the ceiling with a rubber ball.
You toss the ball straight up towards
DESCRIBING MOTION IN 1D
(1D KINEMATICS)
August 29th, 2016
Instructor: Dr. Travis Merritt
Review
Review
Velocity to Position
Acceleration
The motion of a particle is described in the velocity versus time graph shown in the figure. We can say that its
speed
VECTORS, DISPLACMENT AND
VELOCITY
August 24th, 2016
Instructor: Dr. Travis Merritt
Class Logistics
Class Logistics
Vector Mathematics
1D Kinematics  Introduction
CLASS LOGISTICS
1
First Recitation
First Recitation: Optional Diagnostic Test
iClicker credi
CONSTANT
ACCELERATION
MATHEMATICS
August 31, 2016
Instructor: Dr. Travis Merritt
Review
Review
Constant Acceleration Mathematics
Acceleration Problems
When can we be certain that the average velocity of an
object is always equal to its instantaneous veloc
PHY 2305 notes
8/24/16

Scalar only has magnitude
Ex amount of money, distance, speed

Vector has magnitude and direction
If you walk 4 miles East and 3 miles North

The total distance is 7 miles
If you took direct path, it would be 5 miles
Tail to tip
WELCOME TO PHYS 2305
August 22nd, 2016
Instructor: Dr. Travis Merritt
Introduction
Introduction
Class Logistics
Active Learning Environment
WHAT YOU WILL LEARN IN THIS CLASS
1
Classical Mechanics  Study of Motion
Motion of a great many things: basketball
Concepts of
Motion
Motivation & Definitions
How do we describe motion?
How do we explain motion? Why do objects have the
motions they do?
Develop models (simplified description of reality)
mechanics: science/study of motion
kinematics: mathematical descri
Kinematics
Uniform Motion
kinematics:
mathematical description of motion
We defined average velocity:
uniform motion: motion for w/c velocity is constant
Drop subscript:
Example
An object moving along the xaxis has the position vs. time graph shown in
th
2D Motion
Acceleration
changes if direction/magnitude change
Points in direction of
2D Kinematics (plane)
Assume
does not depend on .
2D Kinematics ()
Components
of :
instantaneous acceleration:
Constant accel.: , constant
Example
An object has a positio
Key Practice test 2 Fall 16
1. Three equal negative point charges are placed at three of the corners of a square of side d as
shown in the figure. Which of the arrows represents the direction of the net electric field at the
center of the square?
A. A
B.