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ME2151 ENGINEERING MECHANICS L T P C
3 1 0 4
OBJECTIVEAt the end of this course the student should be able to understand the vectorial and scalar
representation of forces and moments, static equilibrium of particles and rigid bodies both in two
dimensions and also in three dimensions. Further, he should understand the principle of work and
energy. He should be able to comprehend the effect of friction on equilibrium. He should be able to
understand the laws of motion, the kinematics of motion and the interrelationship. He should also be
able to write the dynamic equilibrium equation. All these should be achieved both conceptually and
through solved examples.
UNIT I BASICS & STATICS OF PARTICLES
Introduction – Units and Dimensions – Laws of Mechanics – Lame’s theorem, Parallelogram and
triangular Law of forces – Vectors – Vectorial representation of forces and moments – Vector
operations: additions, subtraction, dot product, cross product – Coplanar Forces – Resolution and
Composition of forces – Equilibrium of a particle – Forces in space – Equilibrium of a particle in
space – Equivalent systems of forces – Principle of transmissibility – Single equivalent force.
UNIT II EQUILIBRIUM OF RIGID BODIES
Free body diagram – Types of supports and their reactions – requirements of stable equilibrium –
Moments and Couples – Moment of a force about a point and about an axis – Vectorial
representation of moments and couples – Scalar components of a moment – Varignon’s theorem –
Equilibrium of Rigid bodies in two dimensions – Equilibrium of Rigid bodies in three dimensions –
Examples
UNIT III PROPERTIES OF SURFACES AND SOLIDS
Determination of Areas and Volumes – First moment of area and the Centroid of sections –
Rectangle, circle, triangle from integration – T section, I section, - Angle section, Hollow section by
using standard formula – second and product moments of plane area – Rectangle, triangle, circle
from integration – T section, I section, Angle section, Hollow section by using standard formula –
Parallel axis theorem and perpendicular axis theorem – Polar moment of inertia – Principal moments
of inertia of plane areas – Principal axes of inertia – Mass moment of inertia – Derivation of mass
moment of inertia for rectangular section, prism, sphere from first principle – Relation to area
moments of inertia.
UNIT IV DYNAMICS OF PARTICLES
Displacements, Velocity and acceleration, their relationship – Relative motion – Curvilinear motion –
Newton’s law – Work Energy Equation of particles – Impulse and Momentum – Impact of elastic
bodies.
UNIT V FRICTION AND ELEMENTS OF RIGID BODY DYNAMICS
Frictional force – Laws of Coloumb friction – simple contact friction – Rolling resistance – Belt
friction.
Translation and Rotation of Rigid Bodies – Velocity and acceleration – General Plane motion.
TEXT BOOK:
1. Beer, F.P and Johnson Jr. E.R. “Vector Mechanics for Engineers”, Vol. 1 Statics and Vol. 2
Dynamics, McGraw-Hill International Edition, (1997).
REFERENCES:
1. Rajasekaran, S, Sankarasubramanian, G., “Fundamentals of Engineering Mechanics”, Vikas
Publishing House Pvt. Ltd., (2000).
2. Hibbeller, R.C., “Engineering Mechanics”, Vol. 1 Statics, Vol. 2 Dynamics, Pearson Education
Asia Pvt. Ltd., (2000).
3. Palanichamy, M.S., Nagam, S., “Engineering Mechanics – Statics & Dynamics”, Tata McGraw-
Hill, (2001).
4. Irving H. Shames, “Engineering Mechanics – Statics and Dynamics”, IV Edition – Pearson
Education Asia Pvt. Ltd., (2003).
5. Ashok Gupta, “Interactive Engineering Mechanics – Statics – A Virtual Tutor (CDROM)”, Pearson
Education Asia Pvt., Ltd., (2002).
For Further Reading,
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