Mechanics is a physical science dealing with the action of forces on bodies
↳ Bodies - solids, liquids, or gases
Statics - solid mechanics
↳ bodies at rest
↙ ↓ ↘
Rigid bodies : will not change shape under force
Statics - at rest (ME 2010)
Dynamics - under acceleration (ME 2030)
Elasticity: deformation is recoverable (ME 2020)
Plasticity: permanent deformation
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Principles of Newtonian Mechanics
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Absolute Concept: independent of each other
Space, Time, Mass
Derived Concept: needs absolute concepts to define
Particle: defined ny a single point in space
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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
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Imbalance in forces: body wants to move under acceleration
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3. Action and Reaction:
To every action, equal and opposite reaction
Newton’s Law of Gravitation
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G= gravitational acceleration