ECOR 1101 Lecture Notes - Lecture 1: Significant Figures, Fluid Mechanics, Statics

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Mechanics, Units, Significant Digits
January 5, 2018 7:04 PM
What is Mechanics?
Mechanics is the study of bodies either at rest or moving subject to the action of forces.
Includes:
This Course: Rigid-Body mechanics (do not change shape)
Deformable body mechanics (changes shape)
Fluid mechanics
Statics: objects don’t move , constant velocity, a= 0
Dynamics: objects do move, a /= 0
Kinematics: Geometry of motion
Kinetics: Forces causing motion
History:
Moment of a Force: Leonardo Da Vinci
Law for freefall, Strength of beams, Concepts of stress : Galileo Galilei
: Isaac Newton: Laws of motion
A body stays at rest or in uniform motion until acted upon (inertia)
A change in motion is proportional to the force (F=ma)
For every action, there is an equal and opposite reaction
Newton's Law of Gravity (1687):
W = mg
G = gravitational constant 9.8 m/s2 or 32.3 ft/s2
Weight is in N (Force of gravity)
Mass is in Kg
Systems and Base Units:
Length: Position
Time: Motion/speed
Mass: Amount of matter
Force: Push or pull between bodies (1N = 1 apple weight)
International System (SI)
U.S. Customary System (USCS)
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Document Summary

What is mechanics: mechanics is the study of bodies either at rest or moving subject to the action of forces, includes: This course: rigid-body mechanics (do not change shape) Fluid mechanics: statics: objects don"t move , constant velocity, a= 0, dynamics: objects do move, a /= 0. History: moment of a force: leonardo da vinci, law for freefall, strength of beams, concepts of stress : galileo galilei, : isaac newton: laws of motion. A body stays at rest or in uniform motion until acted upon (inertia) A change in motion is proportional to the force (f=ma) For every action, there is an equal and opposite reaction. W = mg: g = gravitational constant 9. 8 m/s2 or 32. 3 ft/s2, weight is in n (force of gravity, mass is in kg. Systems and base units: length: position, time: motion/speed, mass: amount of matter, force: push or pull between bodies (1n = 1 apple weight, international system (si, u. s.

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