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Latest Articles

Mechanics- a simplified overveiw.

Arrow Image Just felt like writing up a few very short notes I found.



Mechanics:
Mechanics is the study of motion, it is a major part of Physics and Mathematics, Newton was a major contributor to the field and Einstein of course... However these are not the only two!

Newtonian[ Or Classic] Mechanics:

The equations of motion:
1. v = u + at
2. x = ut + ( at(2) )/2
3. v(2) = u(2) + 2ax

Where a is Acceleration, u is initial velocity, v is final velocity, t is time, x is displacement[ s is used sometimes]. Also note because I don't know how to do superscript 2 here (2) stands for to the power of 2 [squared].

Newton's laws of motion:

Newtons first law of motion:
A body at rest or constant velocity will remain at rest or constant velocity untill a resultant force acts upon it.

Newton's second law of motion:
F=MA, Force = Mass* Acceleration.
Or Force=dP/dT change in moment over change in time. Also, Force*Time is known as IMPULSE. At a basic level acceleration is caused by a force, at a higher level mass is also involved[ we can assume its constant, read below for further details].

Newtons third law of motion:

Basic: Every action has an equal and opposite action,

but more accuratley:

If body A acts on body B, then body B will act on body A with a force equal in magnitude but opposite in direction.

Thrid law pairs are forces which are equal but opposite and also must be the same type of force.

Quantum Mechanics:

Newtonian or Classical Mechanics only applies while mass is contstant, at velocities greater than half that of light or very high energies then the phenominom described by E=MC(2) and explained by Einstien in his paper: "Is the inertia of a body dependant on its energy?" occurs and Newtonian mechanics fails. At these extremes mass is sufficiently increased (M=E/C(2)) as C the velocity of light is always constant. Once the mass changes so does the acceleration (F=MA). However this does not effect the results of 'normal', low velocity, motions and as Quantum Mechanics is more complex than Classical, Newtonian equations are applied.

Comments

system_meltdownon November 11 2005 - 16:55:24
Wow dude you write some class articles.
Anarcho-Hippieon November 11 2005 - 20:52:40
An extra hour of physics never hurt anybody didn't it Wink
liquidiceon November 11 2005 - 22:30:14
Well done wolf, this is gonna come in alot of handy for anybody thats into public-privet key encryption
wolfmankurdon November 11 2005 - 22:43:46
wrong article liquidice, lmfao! you just listen to what I said it might be usefull for then pretended to read 'em!
@nnyon November 13 2005 - 14:15:18
Nice article, very informative Smile And just for future reference: (Alt + 0178) = ² (Alt + 0179) = ³ If that was what you were after
wolfmankurdon November 23 2005 - 18:49:32
Ah thanks but it doesn't work on linux Sad
Mtutnidon March 26 2011 - 18:17:16
Quantum mechanics? I think you have mixed this up with something. Quantum mechanics is about the mechanics of small things like protons electrons neutrons quarks and their entanglement and wave-particle duality and not about high speeds of objects...
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