2010-11

JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY KAKINADA

II B.TECH. (MECHANICAL ENGINEERING)

II Year B.Tech. – I Sem.

ENIGINEERING MECHANICS

UNIT – I

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.

UNIT – II

Equilibrium of Systems of Forces : Free Body Diagrams, Equations of Equilibrium of Coplanar Systems, Spatial Systems for concurrent forces. Lamis Theorm, Graphical method for the equilibrium of coplanar forces, Converse of the law of Triangle of forces, converse of the law of polygon of forces condition of equilibrium.

UNIT – III

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

Centre of Gravity : Centre of gravity of simple body (from basis principles), centre of gravity of composite bodies, pappus theorem.

UNIT – IV

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 – V

Analysis of perfect frames ( Analytical Method) – Types of Frames – Assumptions for forces in members of a perfect frame, Method of joints, Method of sections, Force table, Cantilever Trusses, Structures with one end hinged and the other freely supported on rollers carrying horizontal or inclined loads.

UNIT – VI

Kinematics : Rectilinear and Curvelinear motions – Velocity and Acceleration – Motion of Rigid Body – Types and their Analysis in Planar Motion. Kinetics : Analysis as a Particle and Analysis as a Rigid Body in Translation – Central Force Motion – Equations of Plane Motion – Fixed Axis Rotation – Rolling Bodies.

UNIT – VII

Work – Energy Method : Equations for Translation, Work-Energy Applications to Particle Motion, Connected System-Fixed Axis Rotation and Plane Motion. Impulse momentum method.

UNIT – VIII

Friction : Introduction , limiting friction and impending motion, coulomb’s laws of dry friction , coefficient of friction, cone of friction. Applications of friction- impending motion of connected bodies , relative motion, ladder friction, wedges, screw friction.

TEXT BOOKS :

1. Engg. Mechanics ,Timoshenko & Young.

2. Engg. Mechanics, R.K. Bansal , Laxmi publications

REFERENCES :

1. Engineering Mechanics , Fedinand . L. Singer , Harper – Collins.2. Engineering Mechanics statics and dynamics , A Nelson , Mc Gra Hill publications

3. Engg. Mechanics Umesh Regl, Tayal.

COURSE OBJECTIVES

1: To give students practice in applying their knowledge of mathematics, science, andengineering and to expand this knowledge into the vast area of “rigid body Mechanics” .2: To enhance students’ ability to design by requiring the solution of open ended problems.3: To prepare the students for higher level courses such as courses in Mechanics of Solids,Mechanical Design.

COURSE OUTCOMES, Student have the ability to:1) Solve for the resultants of any force systems2) Determine equivalent force systems3) Obtain the centroid, first moment and second moment of an area4) Describe the motion of a particle in terms of its position, velocity and accelerationin different frames of reference5) Analyze the forces causing the motion of a particle6) Use the equation of motion to describe the accelerated motion of a particle7) Apply work, energy, impulse and momentum relationships for a particle in motion8) Solve the mechanics problems associated with friction forces

CONTRIBUTION OF COURSE TO MEETING THE REQUIREMENTS:

Math and Basic sciences

Engineering Topics General Education Engineering Design

RELATIONSHIP OF COURSE TO PROGRAM OUTCOMES:

a)An ability to apply knowledge of mathematics, science, and engineering b) An ability to design and conduct experiments , as well as to analyze and interpret datac) An ability to design a system, component or process d) An ability to function on multi – disciplinary teamse) An ability to identify formulate and solve engineering problems f) An understanding of professional and ethical responsibilityg) An ability to communicate effectivelyh) The broad education necessary to understand the impact of engineering solutions in global, economic, environmental and societal context

i) A recognition of the need for and an ability to engage in life-long learningj) A knowledge of contemporary issues k) An ability to use the techniques, skills and modern engineering tools necessary for engineering practice

ASSESEMENT OF LEARNING OUTCOMES:

CAY:2011-12SEM: □ ODD □ EVEN

Date:

SUBJECT Engineering mechanicsYear: □I □II □III □IV

FACULTYCAY: Current academic year

LEARNING OUTCOMES

1) Solve for the resultants of any force systems2) Determine equivalent force systems3) Obtain the centroid, first moment and second moment of an area4) Describe the motion of a particle in terms of its position, velocity and accelerationin different frames of reference5) Analyze the forces causing the motion of a particle6) Use the equation of motion to describe the accelerated motion of a particle7) Apply work, energy, impulse and momentum relationships for a particle in motion

8) Solve the mechanics problems associated with friction forces

PLEASE EVALUATE ON THE FOLLOWING SCALE

Excellent(E) Good(G) Average(A) Poor(P) No Comment(NC)

5 4 3 2 1

S.NO QUSTIONAIRE E G A P NC5 4 3 2 1

GENERAL OBJECTIVES:1 Has the course achieved its stated objectives? □ □ □ □ □2 Have you gained the stated skills? □ □ □ □ □3 Whether the syllabus is adequate to achieve the objectives? □ □ □ □ □4 Whether the teacher has helped in acquiring the stated skills? □ □ □ □ □5 Whether the teacher has given real life applications of the

Course? □ □ □ □ □SPECIFIC LEARNING OUTCOMES:

6. Can you solve any type of resultant s of any force system? □ □ □ □ □7. Are you able to determine equivalent force system.? □ □ □ □ □8. Are you able to determine the centroid and moment of inertia.? □ □ □ □ □9. Can you able to Describe the motion of a particle in terms of its position, velocity and

acceleration? □ □ □ □ □10. Are you Analyze the forces causing the motion of a particle □ □ □ □ □11. Are you able to apply work energy theorem □ □ □ □ □12. Can you solve the problem associated with frictional forces

SATISFACTION LEVEL:12. Are you satisfied with the outcomes achieved through this course? □YES □ NO13. If your answer is No, please indicate your preferences:

1) More inputs, additional contents, real life examples2) More Experienced, capable Teacher.

□YES □ NO