EX: 4, 5, 9, 10, 20, 26, 34, 83
EX 3.4:
The position of a squirrel running in a park is given by
(a)What are
and
, the x- and y-components of the velocity of the squirrel, as functions of time? (b) At t = 5.00s, how far
is the squirrel from its initial po
DQ: 1, 2, 3, 6, 7, 10, 11, 12, 16 EX: 4, 5, 9, 10, 20, 26, 34, 83
DQ 3.1:
A simple pendulum (a mass swinging at the end of a string) swings back and forth in a circular arc. What is the direction of the
acceleration of the mass when it is at the ends of t
DQ 7.2 A projectile has the same initial kinetic energy no matter what the angle of projection. Why doesnt it rise to the same
maximum height in each case? The maximum height of the projectile is
Here
is acceleration due to gravity.
is
the initial velocit
DQ 5.1 A man sits in a seat that is suspended from a rope. The rope passes over a pulley suspended from the ceiling, and the
man holds the other end of the rope in his hands. What is the tension in the rope, and what force does the seat exert on the
man?
Physics 185
Orange Coast College
Fall 2012
Arnold Guerra III
Extra Example Chapter 5
1. A block weighs 20 N and rests on a horizontal surface. If s = 0.4 and k = 0.2 between the
surfaces, then
(a) what is the frictional force acting on the block? 0N
(b) w
Physics 185
Orange Coast College
Arnold Guerra III
Extra Examples Chapter 1
1. Calculate the resultant of the four vectors shown in the figure below using:
(a) a graphical method
(b) an algebraic method, and
(c) unit vectors , and .
i
j
R = 12.82 (m)
angl
Orange Coast College
Physics 185
Dr. Arnold Guerra III
Extra Examples - Chapter 3
1. The projectile shown in the figure below is fired at t = 0 seconds with an initial speed
of 160 ft/s at an angle of 53 0 above the horizontal axis.
(a) Find x, y, and v a
Chapter 3
Motion in Two or Three Dimensions
3.1 Position and Velocity Vectors
r
(A) The position vector r of an object is defined as
the vector that goes from the origin of the coordinate
system to the point P that the object is at. The cartesian
!
coordi
Physics 185
Orange Coast College
Arnold Guerra III
Extra Examples Chapter 14
1. An object of mass 100 grams hangs from a long spring. When pulled down 10 cm from its
equilibrium position and released from rest, it vibrates with a period of 2 seconds.
(a)
Physics 185
Orange Coast College
Arnold Guerra III
Extra Examples Chapter 8
1. A projectile of mass 9.6 kg is launched from the ground with an initial velocity of 12.4 m/s at
an angle of 54o above the horizontal (see the figure). At some time after its la
Physics 185
Orange Coast College
Arnold Guerra III
Extra Examples Chapter 16
1. A siren mounted on the roof of a firehouse emits sound at a frequency of 900 Hz. A steady
wind is blowing with a speed of 15.0 m/s. Taking the speed of sound in calm air to be
Orange Coast College Physics 48 5
Name: Dr. Arnold Guerra III
Experiment #
Maximizing the Range at a Proiectile
In this experiment you are to experimentally measure the angle for maximum range of a
projectile. You are to measure the average range o
Physics 185
Orange Coast College
Arnold Guerra III
Extra Examples Chapter 2
1. A car traveling at a constant velocity of magnitude 45.0 m/s passes a trooper hidden behind a
billboard. One second after the speeding car passes the billboard; the trooper set
Chapter 9
Rotation of Rigid Bodies
Rotational Motion
A rigid body moves in pure rotation if every point of the
body moves in a circular path. The centers of these circles
must lie on a common straight line called the axis of
rotation.
1
9.1 Angular Veloci
!
Chapter 11
Equilibrium and Elasticity
11.1 and 11.3 Conditions for Equilibrium
For a rigid object to be in mechanical equilibrium, two
conditions must be satisfied:
(1) The net external force acting on the object must be
zero. That is,
r
"F = 0
"
" Fx =
Chapter 10
Dynamics of Rotational Motion
10.1 Torque
The word torque comes from the Latin word that means
r
r
twist. The torque ! of a force F about a point P in space
is equal to the cross product (also called vector product)
r
r
of the position vector r
Chapter 12
Fluid Mechanics
12.1 Density
A. The density of a substance of uniform composition is
defined as its mass M divided by its volume V. That is,
!=
M
V
The density of water at 4 oC is 1000 kg/m3 = 1 g/cm3
B. The specific gravity of a substance is d
Chapter 8
Linear Momentum, Impulse, and Collisions
8.1 Linear Momentum and Impulse
r
The linear momentum p of a particle of mass m moving
r
with velocity v is defined as:
r
r
p " mv
r
Note that p is a vector that points in the same direction as
r
the velo
Chapter 16
Sound and Hearing
16.1 Sound Waves
Sounds are longitudinal waves produced by the vibrations
of material objects. Your voice results from the vibrations
of your vocal cords.
The frequency of the sound waves equals the frequency of
the vibrating
Chapter 13
GRAVITATION
13.1 Newtons Law of Universal Gravitation
Every particle with mass m1 in the universe
attracts every other particle with mass m2 with a
force that is directly proportional to the product of
their masses and inversely proportional to
Chapter 15
Mechanical Waves
A wave is any disturbance from an equilibrium condition,
which travels or propagates with time from one region of
space to another.
A harmonic wave is a periodic wave in which each
particle in the medium undergoes simple harmon
Guidelines for Writing Lab Reports
All lab reports that you turn in must be typed and follow these general guidelines:
I. Opening Paragraph
It should be a short statement or description of what you are going to do in the
experiment.
II. Procedures and Des