Basic principles of Statics

1. 1
Engineering Mechanics
(Statics)
 Instructor
 Lect. Naqash Afzal
 (Lecture - 1)
School of Mechanical and Manufacturing
Engineering
Chapter 1
General Principles
National University of Sciences & Technology
National University of Sciences & Technology

2. 2
Course Introduction
Course Credits: 3-0
Monday: 11:00-1:00
Wednesday: 9:00 – 10:00
Textbook: Engineering Statics by: R.C Hibbler
Reference Books:
1.Engineering Statics by J.L. Marium
2.Engineering Statics by Beer & Johnstan
Contact: malik.naqash.afza@gmail.com
+92-51-90856089
Office: First Floor 210F

3. 3
Learning Outcomes
To provide an introduction to the basic
quantities and idealizations of mechanics
1
To give a statement of Newton’s Laws of
Motion and Gravitation
2
To review the principles for applying for the SI
system of units
3
To examine the standard procedures for
performing numerical calculations
4
To present a general guide for solving
problems
5

4. 4
Introduction to statics
1.1 Mechanics:
Mechanics – A branch of physics concerned with the behavior of
physical bodies subject to Force, F or Displacement, D.
Mechanics
Rigid Body
Deformable Body
Fluids
Statics
Dynamics
Thermodynamics
Solid Mechanics
Mechanics of Materials
Aerodynamics
Fluid Dynamics

5. 5
Statics

6. 6
Examples

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Fundamental Concepts
Basic Quantities:
1.Length: Used to locate a body in space or describe the size of a
body
2.Time: Conceived as a succession of events
3.Mass: A measure of quantity of matter that is used to compare the
action of one body with another.
4.Force: Consider as a “Push” or “Pull” exerted by one body on
another. e.g. Gravitational Forces, Electrical and Magnetic Forces.

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Units of Quantities

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Idealizations
Models or idealizations are used in mechanics in order to simplify
application of the theory. Here we will consider three important
idealizations.
1.Particle: Mass but no size
2.Rigid Body: Mass and Size- a group of particles at fixed distances
from each other
3.Concentrated Force: A load acting at a point on a body.

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Examples

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Examples

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Newton’s Three Law’s of Motion

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Newton’s Three Law’s of Motion

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Newton’s Three Law’s of Motion

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Newton’s Law of Gravitational attraction

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Newton’s Three Law’s of Motion

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General Procedure for Analysis
 Most effective way of learning is “solving problems.
 Read the problem carefully and try to correlate the actual
physical situation with the theory studied.
 Tabulate the problem data and draw any necessary
diagrams.
 Apply the relevant principles, generally in mathematical
form.
 When writing any equations, be sure they are
dimensionally homogeneous.
 Solve the necessary equations, and report the answer with
no more than three significant figures.

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Numerical problems

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Assignment

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Assignment
Problems:
1-1, 1-2, 1-3, 1-4, 1-5, 1-17,1-18,1-19,1-20

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Message of the day
“Our greatest weakness lies in giving up.
The most certain way to succeed is always
to try just one more time”

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Fourier slice theorem (FST)

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