Chapter1

Chapter1 - EML 3011C EML 3011C Mechanics &...

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Unformatted text preview: EML 3011C EML 3011C Mechanics & Materials Mechanics & Materials Chapter1 Chapter1 Force Force FAMU-FSU College of Engineering Department of Mechanical Engineering Spring 2007 Mechanics d Concerned with the state of rest or motion of bodies d Two Branches d Statics d Mechanics of Materials Mechanics d Statics d Equilibrium of Bodies d Mechanics of Materials d Relationship between the external loads, the intensity of internal forces & its deformation response Basic Concepts Quantities d Length (location, position, size) d Time (succession of events) d Force (Push, Pull) d Mass (Properties of Matter) Idealization d Particle (neglect, size, geometry) d Rigid Body (all points within remain in the same position, at fixed distances from each other) d Concentrated Force ( over a very small area, zero) Basic Concepts (Vector Operations) d Physical Qualities d Mass, Force, time distance, density, Temperature, volume, area, length, displacement, velocity, acceleration, weight d Scalar Quantities d Described by their magnitude, mass d ( italic form ) or lower case (a for A) d Vector Quantities d Described by a magnitude, a direction, and a point of application d ( Bold Face ) in the book d Bar or Arrow in handwritten work d Magnitude or A (italic) or a = Basic Concepts (Vector Operations) A , A A A R R Basic Concepts d Newtons First Law d A body at rest tends to remain at rest & a body in motion at a constant velocity will tend to maintain the velocity. d Newtons Second Law d Change of motion is proportional to the moving force impressed and takes place in the direction of the straight line in which such force is impressed. a m F = Basic Concepts d Newtons Third Law d When two bodies interact, a pair of equal and opposite reaction forces will exist at their contact point d This force pair will have the same magnitude and acts along the same direction, but have opposite sense d The mutual force of action and reaction between two bodies are equal, opposite, and collinear Kg = mass lbf =forces d Gravitational Law G = universal constant of gravitation...
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Chapter1 - EML 3011C EML 3011C Mechanics &...

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