PHYSICS 111
LECTURERS
Prof. T. Humanic
Dr. K. Bolland
SYLLABUS/ASSIGNMENT SHEET
Section
2:30 & 3:30
4:30
Office
PRB 2144
Phone
247-8950
SM 1036B 292-8065
Spring 2011
e-mail
humanic.1osu.edu
bolland.1@osu.edu
Course Manager:
Dr. M. Rallis SMITH 1036B, 292-
9.5 Rotational Work and Energy
s = r!
W = Fs = Fr!
! = Fr
W = !"
Consider the work done in rotating
a wheel with a tangential force, F,
by an angle .
9.5 Rotational Work and Energy
DEFINITION OF ROTATIONAL WORK
The rotational work done by a constant torqu
8.6 Rolling Motion
Consider a car moving with
a linear velocity, v.
The tangential speed of a
point on the outer edge of
the tire is equal to the speed
of the car over the ground.
v = v T = r
Also, the tangential acceleration
of a point on the outer edge
Chapter 9
Rotational Dynamics
9.3 Center of Gravity
W1 x1 + W2 x2 + L
xcg =
W1 + W2 + L
DEFINITION OF CENTER OF GRAVITY
The center of gravity of a rigid
body is the point at which
its weight can be considered
to act when the torque due
to the weight is be
Chapter 9
Rotational Dynamics
9.2 Rigid Objects in Equilibrium
If a rigid body is in equilibrium, neither its linear motion nor its
rotational motion changes.
ax = a y = 0
!F
x
=0
! =0
!F
y
=0
!" = 0
9.2 Rigid Objects in Equilibrium
EQUILIBRIUM OF A RIGID
Chapter 8
Rotational
Kinematics
8.3 The Equations of Rotational Kinematics
8.4 Angular Variables and Tangential Variables
The relationship between the (tangential) arc length, s,
at some radius, r, and the angular displacement, ,
has been shown to be
s =
7.5 Center of Mass
The center of mass is a point that represents the average location for
the total mass of a system.
xcm
m1 x1 + m2 x2
=
m1 + m2
7.5 Center of Mass
The motion of the center-of-mass is related to conservation of momentum.
Consider the chan
Chapter 7
Impulse and Momentum
7.2 The Principle of Conservation of Linear Momentum
rr
(sum of average external forces)"t = Pf ! Po
If the sum of the external forces is zero, then
rr
0 = Pf ! Po
r
r
Pf = Po
PRINCIPLE OF CONSERVATION OF LINEAR MOMENTUM
The
Chapter 7
Impulse and Momentum
7.1 The Impulse-Momentum Theorem
There are many situations when the
force on an object is not constant.
7.1 The Impulse-Momentum Theorem
DEFINITION OF IMPULSE
The impulse of a force is the product of the average
force and th
Chapter 6
Work and Energy
6.4 Conservative Versus Nonconservative Forces
DEFINITION OF A CONSERVATIVE FORCE
Version 1 A force is conservative when the work it does
on a moving object is independent of the path between the
objects initial and final positio
Chapter 6
Work and Energy
6.1 Work Done by a Constant Force
Work involves force and displacement.
W = Fs
1 N ! m = 1 joule (J )
6.1 Work Done by a Constant Force
6.1 Work Done by a Constant Force
More general definition of the work done on an object, W, b
Chapter 5
Dynamics of Uniform
Circular Motion
5.1 Uniform Circular Motion
DEFINITION OF UNIFORM CIRCULAR MOTION
Uniform circular motion is the motion of an object
traveling at a constant speed on a circular path.
5.1 Uniform Circular Motion
Let T be the t
Chapter 4
Forces and Newtons
Laws of Motion
4.11 Equilibrium Application of Newtons Laws of Motion
Definition of Equilibrium
An object is in equilibrium when it has zero acceleration.
Fx = 0
!
F
!
y
=0
e.g. brick at rest on a table
4.11 Equilibrium Applic
Chapter 4
Forces and Newtons
Laws of Motion
4.6 Types of Forces: An Overview
Examples of Nonfundamental Forces -All of these are derived from the electroweak force:
normal or support forces
friction
tension in a rope
4.8 The Normal Force
Definition of the
Chapter 4
Forces and Newtons
Laws of Motion
4.6 Types of Forces: An Overview
In nature there are two general types of forces,
fundamental and nonfundamental.
Fundamental Forces - three have been identified,
all other forces are derived from them.
1. Gravi
Chapter 4
Forces and Newtons
Laws of Motion
4.1 The Concepts of Force and Mass
A force is a push or a pull.
Contact forces arise from physical
contact .
Action-at-a-distance forces do not
require contact and include gravity
and electrical forces.
4.1 The
Chapter 3
Kinematics in Two Dimensions
Projetile Motion - Continued
3.3 Projectile Motion
Under the influence of gravity alone, an object near the
surface of the Earth will accelerate downwards at 9.80m/s2.
a y = !9.80 m s
2
ax = 0
v x = vox = constant
3.
Chapter 3
Kinematics in Two Dimensions
3.1 Displacement, Velocity, and Acceleration
r
ro = initial position
r
r = final position
rrr
"r = r ! ro = displacement
3.1 Displacement, Velocity, and Acceleration
Average velocity is the
displacement divided by
th
Chapter 1
Introduction and
Mathematical Concepts
Trigonometry and Vectors
1.4 Trigonometry
1.4 Trigonometry
ho
sin ! =
h
ha
cos ! =
h
ho
tan ! =
ha
1.4 Trigonometry
Find the height of a building which casts a shadow
of 67.2 m when the angle of the Suns ra
Chapter 2
Kinematics in One Dimension
My lecture slides may be found on my website at
http:/www.physics.ohio-state.edu/~humanic/
2.4 Equations of Kinematics for Constant Acceleration
rr
r x ! xo
v=
t ! to
rr
r v ! vo
a=
t ! to
It is customary to dispense
Physics 111 - Mechanics
Lecturer: Tom Humanic
Contact info:
Office: Physics Research Building, Rm. 2144
Email: humanic@mps.ohio-state.edu
Phone: 614 247 8950
Office hours:
Tuesday 4:30 pm
My lecture slides may be found on my website at
http:/www.physic
On-Line Homework Instructions for Physics 111-112-113
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