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Engineering: 1010


Engineering Statics

Dr. Seshu M.R. Adluri


Office: EN 3044 (S.J. Carew Bldg.)

Contact: 12:00-2:00 p.m. Monday


Significance and Rationale:

The subject has two primary purposes:

1.      Introducing the basic thought processes that lead to the successful analysis of a very large class of engineering problems.  This eventually leads to the engineered design of a great many components, structures and vessels in general. 

2.      Introducing fundamental concepts in the engineering use of forces, couples and their equilibrium.  Concepts of free‑body‑diagrams, friction between solids, and basic analysis of simple structures such as trusses are developed..

The material covered in the present course is fundamental to a large variety of further courses in the engineering program.  It is imperative that the students learn the material as thoroughly as possible since the subject is the basis for further development of many ideas later on.  All analysis of engineering solids is based on the principles developed in this course. 

Continuing from the earlier concepts of forces from Physics, the course will seek to cover the theory and application of the principles, emphasizing the basic requirement of satisfying equilibrium of whole and part solids –either by external or internal forces.




1. Introduction

1.1 What is Mechanics?

1.2 Newton's Laws of Motion

1.3 Units of Measure

1.4 Scalars and Vectors

1.6 Cartesian Vectors

2. Equilibrium of a Particle

2.1 Condition for Equilibrium of a Particle


2.3 Coplanar Force Systems (Two-Dimensional)

2.4 Three-Dimensional Force Systems

3. Force System Resultants

3.1 Moment of a Force - Scalar Formulation

3.4 Moment of a Force about a Specified Axis

3.5 Moment of a Couple

3.6 Equivalent System

3.7 Resultants of a Force and Couple System

3.8 Reduction of a Simple Distributed Loading

4. Equilibrium of a Rigid Body

4.1 Conditions for Equilibrium of a Rigid Body


4.3 Two-Dimensions

4.4 Two- and Three-Force Members

4.5 Three-Dimensions

4.6 Constraints for a Rigid Body

5. Structural Analysis

5.1 Simple Trusses

5.2 Method of Joints

5.3 Zero-Force Members

5.4 Method of Sections

5.5 Frames and Machines

5.6 Internal Forces

6. Friction

6.1 Dry Friction

6.2 Wedges

7. Vector Formulation

7.1 Position Vectors

7.2 Vector Dot Product

7.3 Vector Cross Product

7.4 Moment of a Force - Vector Formulation

7.5 Moment of a Force about a Specified Axis

7.6 Resultants of a Force and Couple System

7.7 Equilibrium

7.7.1 Particle - Three-Dimensions

7.7.2 Rigid Body - Three-Dimensions




Hibbeler, R.C. “Engineering Mechanics - Statics & Dynamics, or Engineering Mechanics – Statics” Prentice Hall.      (The Dyamics part is used in a different course later on.  Older editions of the book are usable for theory and examples.  Assignments, etc., could be from the current edition).


Course Evaluation

The examination dates shown below are tentative


Quiz 1

20% (June 01)

Quiz 2

20% (June 29)

Quiz 3

20% (July 20)

Final Examination






The students are expected to solve the assignment problems by themselves in order to reinforce the class instruction.  Please refer to copying policy of the University if there is any doubt.  Help with problems or any other questions can be sought during contact hours and/or tutorial time.  There is a help centre for first year engineering students.  Students are strongly encouraged to use the facility.  Please check their allotted times for each course in order to use their assistance.

Warning:  If the student does not draw proper Free Body Diagrams, the relevant questions may be marked zero even if the rest of the solution is partly or wholly correct.  The same applies for using and clearly stating the correct units at all relevant steps in any given problem.  If the student fails in this, the relevant questions may be marked as zero. 

Calculator Policy: Only simple scientific calculators are permitted in all tests and examinations. Programmable calculators with text storage and graphics capabilities, as well as other aids are NOT allowed.

Exam policy: The formula sheet policy is as per the announcement in the class.  All or a subset of a pre announced exam formula sheet will be provided in the actual exam.    No extra text or notes are permitted in the exam.  IPODS, Blackberries, MP3 players, cell phones, electronic translators or other electronic storage/retrieval devices are not permitted in the exam.  Also, please see the appropriate guidelines from the University regarding such matters.  Unauthorized use of the above aids or devices during quizzes, tests and examinations will be considered as an academic offence.


Exam preparation:

Several solutions for problems are posted at the following link.

These solutions supplement the material covered in the class and the examples available in the textbook.  Use these materials (class notes, textbook solutions and those at the link) to prepare.  Look at the problems at the end of each section in the textbook.  You need not solve each of them completely since most of them are only slightly different from other typical problems. However, try to mentally workout the procedure for solving them.  Some times, it is a good idea to actually solve some of the problems completely.  This gives you practice with ideas as well as with number crunching.   

During the exam, please write your answers in a neat and professional manner with sufficient margins, white space, etc.  Use the correct units, proper sketches and other things discussed in the class. 










The MUN Faculty Association asked us to include the following in Legalese. J  So there! J


The lectures and displays (and all material) delivered or provided in this course, including any visual or audio recording thereof, are subject to copyright owned by the instructor for the course (Dr. Seshu Adluri).  Other copyrights may also be applicable. It is prohibited to record or copy by any means, in any format, openly or surreptitiously, in whole or in part, in the absence of express written permission from the instructor, Dr. Seshu Adluri any of the lectures, materials provided or published in any form during or from the above course.