Date post: | 10-Jun-2015 |
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Week 1 Fundamentals of Engineering Me-chanics: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 mo-tion.
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 magni-tude and direction by the two adjacent sides of a parallelo-gram, 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 magni-tude and direction by the three sides of a triangle, taken in or-der, 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: