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OSU / Mechanical Engineering / MECHENG 2010 / What are the principles of Newtonian Mechanics?

# What are the principles of Newtonian Mechanics? Description

##### Description: Notes from August 22nd lecture from Mokashi.
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Mechanics is a physical science dealing with the action of forces on bodies

↳ Bodies - solids, liquids, or gases

Statics - solid mechanics

↳ bodies at rest

MECHANICS

↙           ↓           ↘

Rigid bodies : will not change shape under force

Statics - at rest (ME 2010)

Dynamics - under acceleration (ME 2030)

Deformable bodies

Elasticity: deformation is recoverable (ME 2020)

Plasticity: permanent deformation

Fluids

Incompressible

(liquids)

Compressible

(gases)

We also discuss several other topics like What are the 5 functional traits that living things have in common?

Principles of Newtonian Mechanics

1. Space - use cartesian coordinates to establish location
2. Time - when/how long? More key in dynamics
3. Mass: how much?
4. Force: action of one body on another

We also discuss several other topics like How computer systems work?

Absolute Concept: independent of each other

Space, Time, Mass

Derived Concept: needs absolute concepts to define

Force

Definitions

Particle: defined ny a single point in space

We also discuss several other topics like What are the points to remember when thinking of genetics?

Rigid Body: composed of multiple particles at fixed distances from each other

Scalar: physical quantity defined only by magnitude

ex. temperature, time, mass, etc.

Vector: need both magnitude and direction

ex. force, moment, displacement, velocity, acceleration

Newton’s Law of Motion

1. Law of Equilibrium:

Balance: net forces lead to rest

We also discuss several other topics like How do I install software on a new personal computer?

2. Acceleration:

Imbalance in forces: body wants to move under acceleration

F=ma

3. Action and Reaction:

To every action, equal and opposite reaction

Newton’s Law of Gravitation

If you want to learn more check out What is the difference between human and nonhuman subjects?

G=gravitational constant

G= gravitational acceleration

Units

Qty

SI

US

length

meter

ft

mass

kg

slug

time

sec

sec

force/weight

N

lbf=lb

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