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Mathematics is an exceptionally useful subject, having numerous applications in business, computing, engineering and medicine to name but a few.
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About the book
Mathematics is an exceptionally useful subject, having numerous applications in business, computing, engineering and medicine to name but a few. `Applied mathematics’ refers to the study of the physical world using mathematics.
This book approaches the subject from an oft-neglected historical perspective. A particular aim is to make accessible to students Newton’s vision of a single system of law governing the falling of an apple and the orbital motion of the moon.
The book and its associated volume of practice problems give an excellent introduction to applied mathematics.
In many respects Applied Mathematics by Example is an ideal text book. It combines a light-hearted approach, well-rounded explanations and plenty of practice opportunities. It makes an ideal companion for those students who are commencing a course in mechanics, either at school or for undergraduate courses in Maths, Engineering or Physics.
From the outset of his teaching career Jeremy Pickles felt that available material was far too dry and dull. His aim was to enliven the study of mechanics through interesting or even humorous examples together with full explanations of where the various principles and formulæ came from. He had the view that this book would serve as both an introduction to mechanics and an introduction to the historical development of the subject.
He begins his story with reference to the experiments of Galileo and the origin of the constant acceleration formulæ. Likewise each main principle is described in the historical context of its origin. Most of the mechanics required for an introductory course, such as that found in A-level maths, deals with discoveries and models put together in the 17th century by Galileo and Isaac Newton. By treating the subject in this way, through asking the same questions that these great scientists did, the reader is able to absorb the essential cause of the mathematics. The effect of this is to give weight and substance to the principles of mechanics. Just as when dealing with projectiles we seek to discover why the path of a cannon ball is a parabola (literally, para – near to, bola – a throw) so we should also seek to determine the cause of the very question and answer. Jeremy addresses these issues with alacrity.
He also had a definite end-target in mind when he put this material together. He asked himself the questions of: How was it proved that the moon stays in orbit around the earth? Why does it not fall down? What keeps it at a constant distance away from us? Who was first able to prove this? Through the text we are introduced to Newton’s way of thinking – that there is a single system of law governing weights and orbits. Jeremy knew that by answering such questions the reader would be able to master most of the mechanics required in the M1 and M2 modules for A-level mathematics. Furthermore, the text provides a useful introduction to mechanics for undergraduates.
Mechanics itself is an endearing and very useful educational tool. It teaches the student to understand physical laws that are expressed in mathematical terms and to apply those principles in unfamiliar situations. It teaches how to work logically and provides an excellent training in problem-solving. By these means mathematics itself is shown as an essential tool for engineering and science. Jeremy’s book does justice to the real nature of the subject.
During the last ten years of his life Jeremy worked as a part-time A level teacher in the department of which I was head. He was an excellent teacher at this level and was devoted to helping the students under his care. This book is written from experience of teaching mechanics, which in itself is an extremely useful background at a time when so many text books are put together by authors solely employed by publishing houses. I sincerely hope that students of introductory mechanics will find this book a useful companion.
James Glover, 2006
About the Author
Jeremy Pickles was born in 1946 in Hampstead. He attended Tonbridge School in Kent and was awarded a scholarship to St John’s College, Cambridge when he was 16. He spent seven years there, gaining a BA and masters, followed by a PhD in Theoretical Physics with a thesis titled ‘Many-body Theory and the Landau Theory of Fermi Liquids’ under the guidance of Brian Josephson (later a Nobel Laureate). He was also a Cambridge Blue in athletics, specialising in the 880 yards.
After leaving Cambridge he became a Research Officer at the Central Electricity Research Laboratories for 20 years, with some success; in 1977 he won a prize for a paper on the calculation of electric fields using Monte-Carlo methods. In 1992 he left to set up his own consultancy, Statistics Extremes. A keen advocate of the beauty and relevance of mathematics, he began teaching A-level maths on a parttime, voluntary basis at St James Independent School, where both his sons had been pupils. He was also an active member of the Institute of Mathematics and its Applications and chaired its London branch from 1993 – 1996.
He attended philosophy courses for many years and through these was initiated into meditation and also introduced to Vedic mathematics. This is an old system of mathematics from the ancient Hindu Vedas that was rediscovered in the early 20th century. The simplicity of the techniques interested Jeremy greatly and he gave a number of lectures on Vedic maths together with Andrew Nicholas, Kenneth Williams and James Glover. He also coauthored two books on the subject: ‘Introductory Lectures on Vedic Mathematics’ and ‘Vertically and Crosswise’.
Throughout his years of teaching, Jeremy made up his own homework questions for his pupils. He wanted to give them practical problems that demonstrated how mathematics worked in the world. He also wanted to give his students an insight into the history of mathematics, something often overlooked. He had a great love and understanding of his subject and was able to convey it with patience and simplicity even to the unmathematical mind.
In 2004, I suggested that he write a book incorporating some of his ideas and work sheets so they could be used by others. He was able to complete it just two months before his death from cancer in 2006.
Sine Pickles, 2010
Introduction by the Author
About the Author
A note on symbols
1 Kinematics – motion in a straight line
1.1 Galileo and the acceleration due to gravity
1.2 Constant acceleration formulæ
1.3 Using the constant acceleration formulæ
1.4 Velocity-time graphs
1.5 Using a velocity-time graph
2.1 Separating horizontal and vertical motion
2.2 Components of velocity
2.3 Maximum range
2.4 Equation of the trajectory
2.5 The envelope
3.1 Newton’s laws
3.2 Identifying forces
3.4 What is a body?
3.5 Connected particles
4 Resistance forces
4.1 Air resistance
4.2 Terminal velocity
4.3 Dynamic friction
4.4 Static friction
4.5 Rolling motion
5 Resolving forces
5.1 Vector addition
5.2 Components of a force
5.3 Resolution of forces
5.4 Resolving forces in two directions
6 Rigid bodies
6.1 Why rigid?
6.2 The lever
6.3 Rigid bodies in equilibrium
7 Centres of gravity
7.1 Using symmetry
7.2 Archimedes’ calculations
7.3 Combining shapes
7.4 Hanging from a fixed point
8.2 Conservation of momentum
8.3 Collisions and explosions
8.5 Duration of impact
8.6 Coecient of restitution
8.7 Oblique impacts
9.1 Potential energy and kinetic energy
9.2 Conservation of mechanical energy
9.3 The work-energy principle
10 Circular motion
10.1 Centripetal acceleration
10.2 Motion in a horizontal circle
10.3 Motion in a vertical circle
10.4 The pendulum
11 Gravitation and planetary motion
11.1 The Copernican model
11.2 Kepler’s first law
11.3 Kepler’s second law
11.4 Kepler’s third law
11.5 Newton’s law of gravitation
A The language of vectors
A.2 Displacement vectors and vector addition
A.3 Position vectors
A.4 Vectors for velocity, momentum, acceleration, force
A.5 Unit vectors
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Jannie Lombard ★★★★★
Very good and helpfull with Mechanics!