Physics, 4e (Walker/Gatch)
Chapter 2 One-Dimensional Kinematics
2.1 Conceptual Questions
1) Two cars are traveling at the same speed and hit the brakes at the same time. One car has
double the deceleration of the other. By what factor does the time requir
Rotational Dynamics: What makes it spin ?
Today
FORA RIGID BODY ROTATING ABOUT A FIXED AXIS
Ch. 9 Dynamics of Rotational Motion:
I
Kinetic Energy of Rotation
Rotation about a Moving Axis
Rolling Objects
Rigid Objects in Equilibrium
Stability and Balance
Goals for Chapter 8
Chapter 8
To study angular velocity and angular
acceleration.
To examine rotation with constant angular
acceleration.
To understand the relationship between linear
and angular quantities.
To determine the kinetic energy of rotation
Positive, Negative, and Zero Work
Today
W (F cos )x
Work - (Kinetic) Energy Theorem
Gravitational Potential Energy
Conservative vs. Non-Conservative
Forces
Conservation of Mechanical Energy
Text Reference:
Chapter 6.2 - 6.5
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The W
Reminder: Conservation of Mechanical Energy
Ch 7 Momentum
Impulse-Momentum Theorem
Conservation of Momentum
Inelastic and Elastic Collisions
Center of Mass
Ch 8 Rotational Motion
Rotational Kinematcs
Relationship between and Linear and Angular Qua
Review example: Mountain climber
Today
A mountain climber, in the process of crossing between two cliffs by a
rope, pauses to rest. She weighs 571 N. As the drawing shows, she is
closer to the left cliff than to the right cliff, with the result that the
t
Review example: Extreme skier
An extreme skier, starting from rest, coasts down a mountain slope
that makes an angle of 25.0 with the horizontal. The coefficient of
kinetic friction between her skis and the snow is 0.200. She coasts
down a distance of 11.
Today
Impulse
J F t
Momentum
p mv
Conservation of momentum
Inelastic and elastic collisions
Center of mass
Text Reference:
Impulse-Momentum Theorem
J p F t
Conservation
of Momentum
Pf Pi
Chapter 7.3 - 7.5
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Applying the Principle
Rotational Dynamics: What makes it spin ?
Today
NET I
Ch. 10 Dynamics of Rotational Motion:
Torque and Angular Acceleration
Moment of Inertia
This
is the rotational analogue of FNET = ma
Torque is the rotational analogue of force:
The amount of twis
Equations of Kinematics in One Dimension
Motion in two dimensions
equations of kinematics in two dimesions
projectile motion
For constant acceleration
we find:
Position
x
1
x x0 v0t at 2
2
Velocity
x
v lim
t 0 t
t
v
v v 0 at
Acceleration
v
a lim
t 0 t
a
Vectors
B
C
A
A vector quantity is a quantity that has
both a magnitude and a direction
Some physical quantities that are vector quantities
are displacement, velocity, acceleration, and force.
A vector is
defined by its
magnitude and
direction,
regardless
Goals for Chapter 2
Today
x
Motion along a straight line
t
v
motion with constant acceleration
a
Kinematics
describes the movement of an object
Text Reference:
t
t
Become comfortable with displacement,
velocity, and acceleration.
Explore motions at co
Constant-Acceleration
Equations of Motion in
Two-Dimensions
Motion in two dimensions
Equations of kinematics in two dimesions
Relative velocity
vx = v0x + axt
x = x0 + v0xt + ( )ax t2
Equations for Projectile
Motion (assuming that
ax = 0, ay = -g)
vx = v0
Fma
Chapter 4
Newtons Second Law
What is a force?
Forces and Newtons Laws of Motion
A Force is a push or a pull.
A Force has magnitude & direction VECTOR !
Adding forces is like adding vectors.
Today .
Newtons laws
Mass and weight
Forces;
Normal
Kinematics in one dimension
Today
For constant acceleration
Position
1-dim motion: Freely falling bodies
1
x x0 v0t at 2
2
x
Velocity
Kinematics in two dimensions
displacement, velocity
x
v lim
t 0 t
t
v
Acceleration
v
a lim
t 0 t
v v 0 at
t
a
a const
Example: Tethered blocks - add one more !
Today
More applications of Newtons laws
Newtons law of gravitation
T1
T2
M3g
Ch. 5 Dynamics of circular motion
T1 M 1a
Uniform circular motion
Centripetal accleration
Centripetal force
Curves
Add all three
College Physics I
Today
Prof. Alfons Schulte
Department of Physics, UCF Office: PS 411
e-mail: Schulte@ucf.edu
Measurement
Precision and Significant Figures
Trigonometry and Vectors
Trigonometry
Vectors and Vector Addition
Office hours:
Mon, Wed 10:0