1.1 Simple harmonic motion

 Page 1 / 4

Oscillation is a periodic motion, which repeats after certain time interval. Simple harmonic motion is a special type of oscillation. In real time, all oscillatory motion dies out due to friction, if left unattended. We, therefore, need to replenish energy of the oscillatory motion to continue oscillating. However, we shall generally consider an ideal situation in which mechanical energy of the oscillating system is conserved. The object oscillates indefinitely. This is the reference case.

Though, we refer an object or body to describe oscillation, but it need not be. We can associate oscillation to energy, pattern and anything which varies about some value in a periodic manner. The oscillation, therefore, is a general concept. We shall, however, limit ourselves to physical oscillation, unless otherwise mentioned.

Further, study of oscillation has two distinct perspectives. One is the description of motion i.e. the kinematics of the motion. Second is the study of the cause of oscillation i.e. dynamics of the motion. In this module, we shall deal with the first perspective.

Oscillation
Oscillation is a periodic, to and fro, bounded motion about a reference, usually the position of equilibrium.

The characteristics of oscillation are enumerated here :

• It is a periodic motion that repeats itself after certain time interval.
• The motion is about a point, which is often the position of equilibrium.
• The motion is bounded.

Note that revolution of second hand in the wrist watch is not an oscillation as the concept of “to and fro” motion about a point is missing. Thus, this is a periodic motion, but not an oscillatory motion. On the other hand, periodic swinging of pendulum in mechanical watch is an oscillatory motion.

Description of oscillation

We need a mathematical model to describe oscillation. We often use trigonometric functions. However, we can not use all of them. It is essentially because many of them are not bounded. Recall the plot of tangent function. It extends from minus infinity to plus infinity - periodically. Actually, only the sine and cosine trigonometric functions are bounded.

The plot of tangent function is shown here. Note that value of function extends from minus infinity to plus infinity.

The plots of sine and cosine functions are shown here. Note that value of function lies between "-1" and "1".

Harmonic oscillation

Harmonic oscillation and simple harmonic oscillation both are described by a single bounded trigonometric function like sine or cosine function having single frequency (it is the number of times a motion is repeated in 1 second). The difference is only that simple harmonic function has constant amplitude over all time (amplitude represents maximum displacement from central or mean position of the periodic motion) as a result of which mechanical energy of the oscillating system is conserved.

where we get a research paper on Nano chemistry....?
nanopartical of organic/inorganic / physical chemistry , pdf / thesis / review
Ali
what are the products of Nano chemistry?
There are lots of products of nano chemistry... Like nano coatings.....carbon fiber.. And lots of others..
learn
Even nanotechnology is pretty much all about chemistry... Its the chemistry on quantum or atomic level
learn
da
no nanotechnology is also a part of physics and maths it requires angle formulas and some pressure regarding concepts
Bhagvanji
hey
Giriraj
Preparation and Applications of Nanomaterial for Drug Delivery
revolt
da
Application of nanotechnology in medicine
what is variations in raman spectra for nanomaterials
ya I also want to know the raman spectra
Bhagvanji
I only see partial conversation and what's the question here!
what about nanotechnology for water purification
please someone correct me if I'm wrong but I think one can use nanoparticles, specially silver nanoparticles for water treatment.
Damian
yes that's correct
Professor
I think
Professor
Nasa has use it in the 60's, copper as water purification in the moon travel.
Alexandre
nanocopper obvius
Alexandre
what is the stm
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
Rafiq
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
Damian
How we are making nano material?
what is a peer
What is meant by 'nano scale'?
What is STMs full form?
LITNING
scanning tunneling microscope
Sahil
how nano science is used for hydrophobicity
Santosh
Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest. Rafiq
Rafiq
what is differents between GO and RGO?
Mahi
what is simplest way to understand the applications of nano robots used to detect the cancer affected cell of human body.? How this robot is carried to required site of body cell.? what will be the carrier material and how can be detected that correct delivery of drug is done Rafiq
Rafiq
if virus is killing to make ARTIFICIAL DNA OF GRAPHENE FOR KILLED THE VIRUS .THIS IS OUR ASSUMPTION
Anam
analytical skills graphene is prepared to kill any type viruses .
Anam
Any one who tell me about Preparation and application of Nanomaterial for drug Delivery
Hafiz
what is Nano technology ?
write examples of Nano molecule?
Bob
The nanotechnology is as new science, to scale nanometric
brayan
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Damian
Is there any normative that regulates the use of silver nanoparticles?
what king of growth are you checking .?
Renato
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
why we need to study biomolecules, molecular biology in nanotechnology?
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
why?
what school?
Kyle
biomolecules are e building blocks of every organics and inorganic materials.
Joe
Got questions? Join the online conversation and get instant answers!