FUNDAMENTALS OF ENGINEERING MECHANICS
Engineering Mechanics is a course taught in the very first year of under graduate curriculum and in this the student develops capability to model an actual problem into an engineering problem and finds the solution using laws of mechanics. An engineering mechanics problem involving forces, is solved to a great extent, if the free body diagram is drawn correctly. Hence throughout the text, authors have given emphasis on drawing neat free body diagrams.
Experience of the authors is that a number of students fail to take note of many important points and commit mistakes. Hence in this book important points are emphasised.
Finding centre of gravity and moment of inertia by tabular method, takes more time and in this process concepts of the terms used is lost. The student studying this method, find it difficult to cope up with the subjects like strength of materials, structural analysis, structural design, machine design, which are taught in higher classes. Hence in this book emphasis is on the method which gives roper concept of the method and is faster also. Clearcut distinction has been brought out between resultant motion and relative motion. Various methods of solving kinematic problems are clearly separated by devoting different chapters and in each of them, the situations in which they are advantageous is pointed out.
In part III, a chapter on Bending moment and Shear Force Diagrams is added to complete the curriculum requirement of many universities. With their emphasis on formulating practical problem into an engineering problem and applying equations of mechanics systematically, the authors have tried to prepare students to solve any problem in Engineering Mechanics .
The state of rest and state of motion of the bodies under the action of different forces has engaged the attention of philosophers, mathematicians and scientists for many centuries. The branch of physical science that deals with the state of rest or the state of motion is termed as Mechanics. Starting from the analysis of rigid bodies under gravitational force and simple applied forces the mechanics has grown to the analysis of robotics, aircrafts, spacecrafts under dynamic forces, atmospheric forces, temperature forces etc.
Archimedes (287–212 BC), Galileo (1564–1642), Sir Issac Newton (1642–1727) and Einstein (1878–1955) have contributed a lot to the development of mechanics. Contributions by Varignon, Euler, D. Alembert are also substantial. The mechanics developed by these researchers may be grouped as (i) Classical mechanics/Newtonian mechanics
(ii) Relativistic mechanics
(iii) Quantum mechanics/Wave mechanics.
Sir Issac Newton, the principal architect of mechanics, consolidated the philosophy and experimental findings developed around the state of rest and state of motion of the bodies and put forth them in the form of three laws of motion as well as the law of gravitation. The mechanics based on these laws is called Classical mechanics or Newtonian Mechanics.
Albert Einstein proved that Newtonian mechanics fails to explain the behaviour of high speed (speed of light) bodies. He put forth the theory of Relativistic Mechanics.
Schrödinger (1887–1961) and Broglie (1892–1965) showed that Newtonian mechanics fails to explain the behaviour of particles when atomic distances are concerned. They put forth the theory of Quantum Mechanics.
Engineers are keen to use the laws of mechanics to actual field problems. Application of laws of mechanics to field problem is termed as Engineering Mechanics. For all the problems between atomic distances to high speed distances Classical/Newtonian mechanics has stood the test of time and hence that is the mechanics used by engineers. Hence in this text classical mechanics is used for the analysis of engineering problems.
download :- here