Engineering Mechanics Lecture Notes: Every concept of mechanics has a practical application, and to better understand that, students need to be aware of how it works. The course objective is thereby clear, i.e., to help students achieve an in-depth understanding of mechanics. Students can refer to the Big Data Lecture Notes For CSE as per the latest and updated syllabus from this article.
After a clear understanding, you can figure out applications of mechanics and figure out the problematic elements. This real-life application thinking is what engineering mechanics wish to promote-giving the students the capability to think. To cultivate this thinking early in the four-year course, the subject is included in the first-year course.
To help you in your understanding and preparations for your semester exams, given below is the free pdf available for download. In case of any further doubts, click on any of the links given below:
- Engineering Mechanics Lecture Notes Free Download
- Reference books for Engineering Mechanics
- Engineering Mechanics Syllabus
- Theoretical problems for Engineering Mechanics
- Frequently asked questions
- Conclusion
Engineering Mechanics Lecture Notes Free Download
The engineering mechanics course included in the first year syllabus of engineering is to develop a habit of problem-solving and promote application-based knowledge. The entire syllabus covers all real-life mechanisms, and students study all of these in-depth. In the beginning, all this can be a bit overwhelming to grasp. So to help students, the Engineering mechanics lecture notes pdf is available to download here. This pdf contains an in-depth explanation of each topic with examples. The language used is simple to maximize retention.
This pdf will help you to score well in your examinations. This pdf is one of the few reliable and accurate study materials available online. It is verified by the experts of the subject so that you can use them without any hesitation. Plus, it is well organized and categorized topic wise to increase the ease of use. You can download the pdf here-
- Engineering mechanics lecture notes pdf download.
- Engineering mechanics 1st-year lecture notes
- Lecture notes for engineering mechanics
- Handwritten notes for engineering mechanics
- Sample questions for engineering mechanics
Reference books for Engineering Mechanics
Engineering mechanics is the study of all the basic underlying concepts governing mechanics. Students need a reliable reference book to refer to in case of any doubts. Also, it will help you to understand the concept more clearly. You can build your knowledge with the help of examples to understand how various systems work. To support you in this, given below is a list of experts verified books students can refer to.
The list is in no particular order. All these books are recommended by students and teachers alike. These books are also available online in pdf form. You can download them and keep them for future reference. Combined with the pdf available for download here, students have an informational rich source of study material. With constant effort from your side, you can score well in your exams.
- Engineering Mechanics, Irving H. Shames (Prentice-Hall publications)
- Mechanics of Solids, Abdul Mubeen(Pearson Education Asia)
- Introduction to Solid Mechanics, I H Shames
- Vector Mechanics for Engineers: Dynamics, F P Beer, and Jhonston
- Schaum’s Outline of Engineering Mechanics, E Nelson
- Mechanics of Materials For Dummies, James H Allen III
- Engineering Mechanics Statics and Dynamics, N H Dubey
- Mechanics of Materials, E.P.Popov (Prentice Hall of India Private Limited)
Engineering Mechanics Syllabus
Engineers are problem solvers, and to solve any given problem, complete knowledge about the problem is a prerequisite. Engineering mechanics is the study of all the basic concepts which govern the mechanics of systems. The course objective is to provide students with this problem-solving ability. The course is a diverse one, and it creates a firm base for all further studies. Most of the concepts taught in this course will find application in future topics, so it is advisable to grasp these topics.
The engineering mechanics syllabus is divided into five units. Each unit has its own set of topics and concepts students need to be aware of. Note that all the topics are related to each other; therefore, to score well, students must understand every topic. To help you give a proper idea of the course contents so that you can plan out your preparation, given below is the unit wise distribution of each topic:
| UNIT I | Two Dimensional Force Systems: Basic concepts, Laws of motion, Principle of Transmissibility of forces, Transfer of a force to a parallel position, Resultant of a force system, Simplest Resultant of Two dimensional concurrent and Non-concurrent Force systems, Distributed force system, Free body diagrams, Equilibrium and Equations of Equilibrium, Applications.
Friction: Introduction, Laws of Coulomb Friction, Equilibrium of Bodies involving Dry-friction, Belt friction, Application. |
| UNIT II | Beam: Introduction, Shear force and Bending Moment, Differential Equations for Equilibrium, Shear Force, and Bending Moment Diagrams for Statically Determinate Beams.
Trusses: Introduction, Simple Truss, and Solution of Simple truss, Method ‘f’ Joints, and Method of Sections. |
| UNIT III | Centroid and Moment of Inertia: Centroid of plane, curve, area, volume and composite bodies, Moment of inertia of plane area, Parallel Axes Theorem, Perpendicular axes theorems, Principal Moment Inertia, Mass Moment of Inertia of Circular Ring, Disc, Cylinder, Sphere and Cone about their Axis of Symmetry. |
| UNIT IV | Kinematics of Rigid Body: Introduction, Plane Motion of Rigid Body, Velocity and Acceleration under Translation and Rotational Motion, Relative Velocity.
Kinetics of Rigid Body: Introduction, Force, Mass and Acceleration, Work and Energy, Impulse and Momentum, D’Alembert’s Principles, and Dynamic Equilibrium. |
| UNIT V | Simple Stress and Strain: Introduction, Normal and Shear stresses, Stress-Strain Diagrams for ductile and brittle material, Elastic Constants, One Dimensional Loading of members of varying cross-sections, Strain energy.
Pure Bending of Beams: Introduction, Simple Bending Theory, Stress in beams of different cross-sections. Torsion: Introduction, Torsion of shafts of circular section, torque and twist, shear stress due to torque. |
Theoretical problems for Engineering Mechanics
The goal of including Engineering mechanics in the syllabus is to expose the students to all the underlying mechanics concepts to better understand their real-life applications. The concepts of mechanics govern everything around us. To give the students a better picture of what type of questions are asked in the examination, given below is a list of engineering mechanics’ theoretical problems. These are some commonly asked questions in examination and question papers. Keep in mind that these are just conceptual based questions to give you an idea of the course contents. To acquire an in-depth knowledge of the course contents, refer to the engineering mechanics lecture notes pdf.
- What is the equilibrium?
- How is friction applied between two bodies?
- Explain the Moment of Inertia with the help of some examples.
- Differentiate between a particle and a rigid body.
- Explain resultant forces.
- What are the different types of beams?
- Define the moment of inertia of an area.
- What do you understand by the radius of gyration?
- What is limiting friction and its applications?
- Differentiate between static and dynamic friction?
- What are the different forms of energy?
- What is linear momentum?
- What is the law of conservation?
- Why is static friction always greater than dynamic friction?
- Explain torque with the help of an example.
Frequently Asked Questions on Engineering Mechanics Lecture Notes
Question 1.
What are the laws of friction?
Answer:
Friction is an opposing force working between two bodies in contact. Friction slows down a moving object due to an opposing force that is applied against the moving body. The amount of friction applied depends on the surfaces of the two bodies in contact. The five laws of friction govern friction between 2 bodies. The five laws of friction are-
- When an object is moving, the friction is proportional and perpendicular to the normal force (N)
- Friction is independent of the area of contact so long as there is an area of contact.
- The coefficient of static friction is slightly greater than the coefficient of kinetic friction.
- Within rather large limits, kinetic friction is independent of velocity.
- Friction depends upon the nature of the surfaces in contact.
Question 2.
Explain the parallel axis theorem.
Answer:
The parallel axis theorem states that:
The moment of inertia of a body about an axis parallel to it is given by the sum of the moment of inertia of the body about the axis through the center and the product of the mass of the body and the square of the distance between both the axes.
Mathematical representation of the parallel axis theorem is given by:
I = Ic + Md2
Where,
I = moment of inertia of the body about an axis parallel to it.
Ic = moment of inertia of the body about the axis passing through the center
M = Mass of the body
d = distance between the two axes.
It is often used to find out the moment of inertia of a body not rotating about its center of mass.
Question 3.
Explain the law of conservation of energy.
Answer:
Julius Mayer, a German physicist, is known as the first person to state the law of conservation in a paper, but the actual study of the law goes way back. In both chemistry and physics studies, the Law of conservation of energy states that “The total energy of an isolated system remains constant,” which means that energy is conserved over time. Laws of conservation are fundamental laws of nature.
A more common and simpler meaning of the law is that energy can neither be created nor destroyed. It can only be transferred from one form to another. For example- during an explosion, chemical energy is converted into kinetic energy, heat energy, and sound energy.
It is not that only energy is conserved; the law of conservation also stands for mass, charge, and momentum.
Question 4.
Explain the moment of inertia.
Answer:
Moment of inertia, also called rotational inertia, determines the torque required to achieve a specific angular acceleration. Just like the force is applied on a body of mass to achieve a specific acceleration, the body’s mass determines the force required to do so. So in angular acceleration, the moment of inertia plays the same role.
Mathematically it is defined as the product between the mass and square of the distance from the rotation axis.
I=mr2
Where,
i= moment of inertia
m= mass of the body
r= distance from the axis of rotation.
The above formula is for a body of point mass. For a rigid body, it is the sum of the moment of inertia of its components taken about the same axes.
Conclusion
Engineering mechanics deals with the practical study of all the concepts of mechanics. With changing times, theoretical knowledge is not enough. Students need to have a practical mindset to become better problem solvers. This course objective is just that, to develop a habit of critical thinking among students. The pdf is a tool for students to understand the subject better and get the most out of this paper. It is very important to have a reliable source of study material in your preparations.