**JNTUK R20 1-2 Engineering Mechanics Material PDF Download**

Students studying JNTUK R20 Civil, Mechanical Branches, Can Download Unit wise R20 1-2 Engineering Mechanics Material/Notes PDFs below.

**Objectives: **The students completing this course are expected to understand the concepts of forces and their resolution in different planes, the resultant of the force system, Forces acting on a body, and their free body diagrams using graphical methods. They are required to understand the concepts of center of gravity and moments of inertia and their application, Analysis of frames and trusses, different types of motion, friction, and work application – the energy method.

**UNIT-1**

**Objectives:** The students will be exposed to the concepts of force and friction, direction, and application.

**Introduction to Engg. Mechanics – Basic Concepts. Systems of Forces**: Coplanar Concurrent Forces – Components in Space – Resultant – Moment of Force and its Application – Couples and Resultant of Force Systems.

**Friction:** Introduction, limiting friction and impending motion, coulomb’s laws of dry friction, coefficient of friction, cone of friction

**UNIT-2**

**Objectives**: The students are to be exposed to the application of free-body diagrams. A solution to problems using graphical methods and the law of the triangle of forces.

**Equilibrium of Systems of Forces: **Free Body Diagrams, Lami’s Theorem, Equations of Equilibrium of Coplanar Systems, Graphical method for the equilibrium, Triangle law of forces, the converse of the law of polygon of forces condition of equilibrium, Equations of Equilibrium for Spatial System of forces, Numerical examples on a spatial system of forces using vector approach, Analysis of plane trusses.

**UNIT-3**** (Mechanical)**

**Objectives:** The students will be exposed to the concepts of the center of gravity. The students are to be exposed to concepts of the moment of inertia and polar moment of inertia, including transfer methods and their applications.

**Centroid: **Centroids of simple figures (from basic principles) – Centroids of Composite Figures

Centre of gravity of simple body (from basic principles), the center of gravity of composite bodies, Pappus theorems.

**Area moments of Inertia:** Definition – Polar Moment of Inertia, Transfer Theorem, Moments of Inertia of Composite Figures, Products of Inertia, Transfer Formula for Product of Inertia.

**Mass Moment of Inertia:** Moment of Inertia of Masses, Transfer Formula for Mass Moments of Inertia, mass moment of inertia of composite bodies.

**UNIT-3**** (Civil)**

**Centroid:** Centroids of simple figures (from basic principles ) – Centroids of Composite Figures

Centre of gravity of simple body (from basic principles), the centre of gravity of composite bodies, pappus theorem.

**FRICTION** Types of friction – Limiting friction – Laws of Friction – static and Dynamic Frictions – Angle of Friction –Cone of limiting friction– Friction of wedge, block, and Ladder

**UNIT-4 (Mechanical)**

**Objectives: **The students will be exposed to motion in a straight line and curvilinear paths, its velocity and acceleration computation, and methods of representing plane motion.

**Rectilinear and Curvilinear motion of a particle:** Kinematics and Kinetics- Work Energy method and applications to particle motion- Impulse momentum method.

**UNIT-4**** (Civil)**

**Area moments of Inertia: **Definition – Polar Moment of Inertia, Transfer Theorem, Moments of Inertia of Composite Figures, Products of Inertia, Transfer Formula for Product of Inertia.

**Mass Moment of Inertia:** Moment of Inertia of Masses, Transfer Formula for Mass Moments of Inertia, mass moment of inertia of composite bodies.

**UNIT-5** **(Mechanical)**

**Objectives: **The students are to be exposed to rigid motion kinematics and kinetics

**Rigid body Motion:** Kinematics and kinetics of translation, Rotation about fixed axis and plane motion, Work Energy method, and Impulse momentum method.

**UNIT-5** **(Civil)**

**Kinematics:** Rectilinear and Curvilinear motions – Velocity and Acceleration – Motion of Rigid Body – Types and their Analysis in Planar Motion. Introduction – Rectilinear motion – Motion with uniform and variable acceleration–Curvilinear motion–Componentsofmotion– Circular motion – Projectiles- Instantaneous center

**Kinetics: **Kinetics of a particle – D’Alembert’s principle – Motion in a curved path – work, energy, and power. Principle of conservation of energy – Kinetics of a rigid body in translation, rotation – work done – Principle of work-energy – Impulse-momentum

**TEXTBOOKS:**

- Engineering Mechanics – S.Timoshenko&D.H.Young., 4thEdn, Mc Graw Hill publications.
- Engineering Mechanics statics and dynamics – R.C.Hibbeler, 11thEdn – Pearson Publ.

**REFERENCE BOOKS:**

- Engineering Mechanics, statics and Dynamics, J.L.Meriam, 6thEdn – Wiley India Pvt Ltd.
- Engineering Mechanics: Statics and Dynamics 3rd edition, Andrew Pytel
- and JaanKiusalaas, Cengage Learning publishers.
- Engineering Mechanics, dynamics, Bhavikatti S.S – NewAge International Publishers.
- Engineering Mechanics, statics and dynamics – I.H. Shames, – PearsonPublications
- Mechanics For Engineers, statics -F.P.Beer&E.R.Johnston – 5
- then Mc Graw Hill Publ.
- Mechanics For Engineers, dynamics – F.P.Beer&E.R.Johnston – 5
- then McGraw Hill Publ.
- Theory & Problems of engineering mechanics, statics & dynamics – E.W.Nelson, C.L.Best&
- W.G. McLean, 5thEdn – Schaum’s outline series – McGraw Hill Publ.
- Engineering Mechanics, Ferdinand. L. Singer, Harper–Collins.
- Engineering Mechanics statics and dynamics, A Nelson, Mc Graw Hill publications
- Engineering Mechanics, Tayal. Umesh Publications.