Mechanics- a simplified overveiw.

Mechanics- a simplified overveiw.

By ghost | 5646 Reads |

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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.