Chapter 22
Magnetic Forces & Magnetic Fields
(part I)
March 10, 2015
Electrostatics:
Source charge creates electric field
Test charge reacts to electric field of source
Magnetostatics:
A source creates a magnetic field
Charges react to magnetic field of s
Problem Solving Methods
Kinematics and Newtons Law (linear)
Rotational kinematics and torque (rotation)
Energy and momentum (linear)
Energy and angular momentum (rotational)
Arc Length
As the particle moves,
the only coordinate that
changes is q
As the pa
Force and fundamental units
Our fundamental dimensions are length, mass,
and time.
Force and mass Newtons laws
Force and distance work and energy
Force and time impulse and momentum
A seemingly simple problem
A cannon of mass M that is free to roll on a
f
Energy
The concept of energy is one of the most
important topics in science
Every physical process that occurs in the
Universe involves energy and energy
transfers or transformations
Energy is not easily defined
Energy Approach to Problems
The energy appr
Nonisolated System
In a nonisolated system:
Energy crosses boundary of the system due to
interaction with the environment
For example, the work-kinetic energy
theorem:
Interaction of system with environment is work
done by external force
Quantity in syste
Chapter 20
Electric Potential and Capacitance
February 19, 2015
Potential Energy
A mass in a gravitational field has potential energy
Energy of position
Takes work to move mass in certain directions
A charge in an electric field also has potential energy
Chapter 20 (part 2)
Electric Potential and Capacitance
February 24, 2015
For an extended object,
=
where the integration is over the charge distribution. Just as with
electric fields, define your dq in terms of some charge density.
Potential is a scalar
Chapter 23
Faradays Law & Inductance
March 19, 2015
Charges make electric fields, which exert forces on other charges
Moving charges (currents) make magnetic fields, which exert forces on
other moving charges (currents)
If currents make magnetic fields, a
Chapter 24
Electromagnetic Waves
March 26, 2015
Generalizing Amperes Law
Amperes law was introduced
as valid for steady currents
We see that more than one
surface can be bound by the
same border
Here, the current is not steady
Generalizing Amperes Law
The
Chapter 22
Magnetic Forces & Magnetic Fields
(part II)
March 17, 2015
The magnetic field around a straight wire forms closed loops concentric
with the wire.
The direction follows the right hand rule
Only one set of loops is shown
The loops exist along the
Chapter 19
Electric Forces and Electric Fields
February 10, 2015
2000 B.C.
700 B.C.
1600
1820
1831
1873
1888
Documents in China suggest knowledge of magnetism
Greeks observe electric and magnetic phenomena:
Elektron is Greek for amber
Electrification not
Chapter 21
Current and Direct Current Circuits
March 3, 2015
Electrodynamics
No longer dealing only with charges at rest in equilibrium
Current is the flow of electric charge
What causes electric charges to flow in a wire?
(What causes water to flow in a
Chapter 19 (part 2)
Electric Forces and Electric Fields
February 12, 2015
Problem 19.19
Three point charges are
arranged as shown.
(a) Find the vector field that
the 6.00-nC and 3.00-nC
charges together create at
the origin.
(b) Find the vector force on
t
5.1 Forces of Friction
When an object is in motion on a surface or
through a viscous medium, there will be a
resistance to the motion
This is due to the interactions between the object
and its environment
This resistance is called the force of friction
5.
HOMEWORK #8- Physics 101 - Spring 16
This assignment is due Tuesday, April 26 by the end of class.
Please write your full name and student ID number on the first page.
Show all your work, number each problem, box your final answer and
staple all the pa
HOMEWORK #10- Physics 101 - Spring 16
This assignment is due Tuesday, May 10 by the end of class.
Please write your full name and student ID number on the first page.
Show all your work, number each problem, box your final answer and
staple all the pag
HOMEWORK #9- Physics 101 - Spring 16
This assignment is due Tuesday, May 3 by the end of class.
Please write your full name and student ID number on the first page.
Show all your work, number each problem, box your final answer and
staple all the pages
HOMEWORK #11- Physics 101 - Spring 16
This assignment is due Tuesday, May 17 by the end of class.
Please write your full name and student ID number on the first page.
Show all your work, number each problem, box your final answer and
staple all the pag
HOMEWORK #3- Physics 101 - Spring 16
This assignment is due Thursday, March 3 by the end of class.
Please write your full name and student ID number on the first page.
Show all your work, number each problem, box your final answer and
staple all the pa
HOMEWORK #6- Physics 101 - Spring 16
This assignment is due Tuesday, April 12 by the end of class.
Please write your full name and student ID number on the first page.
Show all your work, number each problem, box your final answer and
staple all the pa
HOMEWORK #7- Physics 101 - Spring 16
This assignment is due Tuesday, April 19 by the end of class.
Please write your full name and student ID number on the first page.
Show all your work, number each problem, box your final answer and
staple all the pa
HOMEWORK #5- Physics 101 - Spring 16
This assignment is due Tuesday, March 22 by the end of class.
Please write your full name and student ID number on the first page.
Show all your work, number each problem, box your final answer and
staple all the pa
Practice Quiz 2
Name_
1) A runner runs around a track consisting of two parallel lines 96 m long connected at the ends by two
semicircles with a radius of 49 m. She completes one lap in 100 seconds. What is her average velocity?
A) 2.5 m/s
B) 5.0 m/s
C) 1
Practice Quiz Ch 4
Name_
1) A 3.0-kg and a 5.0-kg box rest side-by-side on a smooth, level floor. A horizontal force of 32 N is applied to the
5.0-kg box pushing it against the 3.0-kg box, and, as a result, both boxes slide along the floor. How large is t