|
|
|
Love And Marriage:
It is not enough to say "I love you"
unless
these words are followed up with loving actions.
You have to do both to have a happy married life.Marriage does not
present you with happiness.
You have to take happiness into marriage.
"Love & Marriage" is a powerful presentation
of a happy marriage.
Click here to Join
Nikahpoint.com -100% FREE MATRIMONIAL
|
Equations of Motion - The Physics Hypertextbook
physics.info/
This is the way things get done in physics. It is such a useful
technique that we will use it over and over again. Our goal in this
section, is to derive new equations .. |
|
|
|
|
The Kinematic Equations
The goal of this first unit of The Physics Classroom has
been to investigate the variety of means by which the
motion of objects can be described. The variety of
representations that we have investigated includes
verbal representations, pictorial representations,
numerical representations, and graphical representations
(position-time graphs and velocity-time graphs). In
Lesson 6, we will investigate the use of equations to
describe and represent the motion of objects. These
equations are known as kinematic equations.
There are a variety of quantities associated with the
motion of objects - displacement (and distance),
velocity (and speed), acceleration, and time. Knowledge
of each of these quantities provides descriptive
information about an object's motion. For example, if a
car is known to move with a constant velocity of 22.0
m/s, North for 12.0 seconds for a northward displacement
of 264 meters, then the motion of the car is fully
described. And if a second car is known to accelerate
from a rest position with an eastward acceleration of
3.0 m/s2 for a time of 8.0 seconds, providing a final
velocity of 24 m/s, East and an eastward displacement of
96 meters, then the motion of this car is fully
described. These two statements provide a complete
description of the motion of an object. However, such
completeness is not always known. It is often the case
that only a few parameters of an object's motion are
known, while the rest are unknown. For example as you
approach the stoplight, you might know that your car has
a velocity of 22 m/s, East and is capable of a skidding
acceleration of 8.0 m/s2, West. However you do not know
the displacement that your car would experience if you
were to slam on your brakes and skid to a stop; and you
do not know the time required to skid to a stop. In such
an instance as this, the unknown parameters can be
determined using physics principles and mathematical
equations (the kinematic equations).
The kinematic equations are a set of four equations that
can be utilized to predict unknown information about an
object's motion if other information is known. The
equations can be utilized for any motion that can be
described as being either a constant velocity motion (an
acceleration of 0 m/s/s) or a constant acceleration
motion. They can never be used over any time period
during which the acceleration is changing. Each of the
kinematic equations include four variables. If the
values of three of the four variables are known, then
the value of the fourth variable can be calculated. In
this manner, the kinematic equations provide a useful
means of predicting information about an object's motion
if other information is known. For example, if the
acceleration value and the initial and final velocity
values of a skidding car is known, then the displacement
of the car and the time can be predicted using the
kinematic equations. Lesson 6 of this unit will focus
upon the use of the kinematic equations to predict the
numerical values of unknown quantities for an object's
motion.
The four kinematic equations that describe an object's
motion are:
There are a variety of symbols used in the above
equations. Each symbol has its own specific meaning. The
symbol d stands for the displacement of the object. The
symbol t stands for the time for which the object moved.
The symbol a stands for the acceleration of the object.
And the symbol v stands for the velocity of the object;
a subscript of i after the v (as in vi) indicates that
the velocity value is the initial velocity value and a
subscript of f (as in vf) indicates that the velocity
value is the final velocity value.
Each of these four equations appropriately describes the
mathematical relationship between the parameters of an
object's motion. As such, they can be used to predict
unknown information about an object's motion if other
information is known. In the next part of Lesson 6 we
will investigate the process of doing this.
Post Comment |
|
.
|
|
11th class physics notes.htm
200 puzzling physics
problems.htm
a level physics notes.htm
Auto.htm
Books.htm
branches of chemistry.htm
branches of physics.htm
branches of
physics and their meaning.htm
Career.htm
chemistry quiz.htm
classical mechanics.htm
Computer Hardware.htm
Computing.htm
Computing.htm
definition of physics.htm
easy physics projects.htm
engineering physics notes.htm
facts physics trivia.htm
Finance-Shopping.htm
general physics quiz.htm
grade 11 physics formulas.htm
grade 11 physics notes.htm
help physics problems.htm
high school physics
problems.htm
high school physics
projects.htm
Home finance.htm
how to solve physics
problems.htm
igcse physics notes.htm
iit physics problems.htm
Insurance.htm
Investing.htm
Job Search.htm
major branches of physics.htm
nuclear physics.htm
o level physics notes.htm
physics electricity quiz.htm
physics equations.htm
physics experiments.htm
physics facts quiz.htm
physics formula sheet.htm
physics formulas.htm
physics formulas for 12th.htm
physics practice problems.htm
physics formulas friction.htm
physics formulas kinematics.htm
physics formulas list.htm
physics formulas pdf.htm
physics games.htm
physics help.htm
physics notes.htm
physics notes 1st year.htm
physics notes for class
12.htm
physics practice problems.htm
physics problems.htm
physics problems with
solutions.htm
physics projects.htm
physics projects for
class 11.htm
physics projects for
class 12.htm
physics projects for class
9.htm
physics trivia quiz.htm
plasma physics.htm
quantum computing.htm
quantum mechanics.htm
quantum physics.htm
quantum physics for
dummies.htm
quantum physics law
of attraction.htm
quantum physics video.htm
quantum theory.htm
Resume.htm
science projects.htm
Software.htm
Sporting Goods.htm
string theory.htm
sub branches of physics.htm
theory of relativity.htm
Web Hosting.htm
work physics problems.htm |
