Fundamentals
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Fundamentals

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Fundamentals Fundamentals Presentation Transcript

  • Week 1 Fundamentals of Engineering Mechanics: Objectivities of this class 1. Fundamentals of Engineering Mechanics - Definitions of Key Concepts 2. Statics - Fundamental Statics of a Rigid Body 3. Summary - Summary, Quiz, Real-life examples This class is lecturing in order of above objectivities.
  • 1. Introduction - What is Engineering Mechanics? – Engineering Mechanics Kinematics Kinetics DynamicsStatics Week 1 Fundamentals of Engineering Mechanics:
  • 1. Introduction - What is Engineering Mechanics? – Engineering Mechanics Kinematics Kinetics DynamicsStatics Week 1 Fundamentals of Engineering Mechanics: Branch of science which deals with the behavior of a body when the body is at rest or in motion. Divided in two branch with Statics and Dynamics.
  • 1. Introduction - What is Engineering Mechanics? – Engineering Mechanics Kinematics Kinetics DynamicsStatics Week 1 Fundamentals of Engineering Mechanics: Body is at rest. Body is in motion.
  • 1. Introduction - What is Engineering Mechanics? – Engineering Mechanics Kinematics Kinetics DynamicsStatics Week 1 Fundamentals of Engineering Mechanics: When the forces are also considered for the body in motion When the forces which cause the motion are not considered.
  • 2. Definitions(Key concepts) ◆ Vector Quantity: A quantity which is completely specified by magnitude and direction ex: velocity ,acceleration ◆ Scalar Quantity: A quantity, which is completely specified by magnitude only ex: mass ,length, temperature…. ◆ A Particle : A particle is a body of infinitely small volume and the mass of the particle is considered to be concentrated at a point Week 1 Fundamentals of Engineering Mechanics:
  • 2. Definitions(Key concepts) ◆ Law of Parallelogram of Forces : Used to determine the resultant of two forces acting at a point in a plane - If two forces, acting at a point be represented in magnitude and direction by the two adjacent sides of a parallelogram, then their resultant is represented in magnitude and direction by the diagonal of the parallelogram passing through that point. Week 1 Fundamentals of Engineering Mechanics:
  • 2. Definitions(Key concepts) ◆ Law of Parallelogram of Forces : * From C draw CD perpendicular to OA produced. Let Now a = Angle between two forces P and Q = LAOB Angle LDAC=LAOB = a Week 1 Fundamentals of Engineering Mechanics:
  • 2. Definitions(Key concepts) ◆ Law of Triangle of Forces: If three forces acting at a point be represented in magnitude and direction by the three sides of a triangle, taken in order, they will be in equilibrium. ◆ Lami's Theorem : If three forces acting at a point are in equilibrium, each force will be proportional to the sine of the angle between the other two forces. Week 1 Fundamentals of Engineering Mechanics:
  • 2. Definitions(Key concepts) Week 1 Fundamentals of Engineering Mechanics:
  • 2. Definitions(Key concepts) ◆ System of Units: * C.G.S. System of units. Length is expressed in centimetre, mass in gram and time in second. The unit of force in this system is dyne * M.K.S. System of Units. Length is expressed in metre, mass in kilogram and time in second. * S.I. System of Units: Length is expressed in metre, mass in kilogram and time in second. The unit of force in this system is Newton and is represented N. Week 1 Fundamentals of Engineering Mechanics:
  • 2. Definitions(Key concepts) ◆ System of Units: <Relation between Newton and Dyne> Week 1 Fundamentals of Engineering Mechanics: