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: