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Why Cats Land on Their Feet: And 76 Other Physical Paradoxes and Puzzles [Paperback]

Mark Levi

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Book Description

7 May 2012 0691148546 978-0691148540

Ever wonder why cats land on their feet? Or what holds a spinning top upright? Or whether it is possible to feel the Earth's rotation in an airplane? Why Cats Land on Their Feet is a compendium of paradoxes and puzzles that readers can solve using their own physical intuition. And the surprising answers to virtually all of these astonishing paradoxes can be arrived at with no formal knowledge of physics.

Mark Levi introduces each physical problem, sometimes gives a hint or two, and then fully explains the solution. Here readers can test their critical-thinking skills against a whole assortment of puzzles and paradoxes involving floating and diving, sailing and gliding, gymnastics, bike riding, outer space, throwing a ball from a moving car, centrifugal force, gyroscopic motion, and, of course, falling cats.

Want to figure out how to open a wine bottle with a book? Or how to compute the square root of a number using a tennis shoe and a watch? Why Cats Land on Their Feet shows you how, and all that's required is a familiarity with basic high-school mathematics. This lively collection also features an appendix that explains all physical concepts used in the book, from Newton's laws to the fundamental theorem of calculus.


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Review

A collection of physical puzzlers, often with counter intuitive manifestations, which, for all that, admit rigorous explanation supported by physical intuition. . . . [H]ugely entertaining and provide hours of brainy activities. (Alexander Bogomolny CTK Insights )

This book seeks to nurture this physical intuition in readers by analyzing several paradoxes while keeping the math to a minimum. Through examining one puzzle or paradox after another, Levi emphasizes the underlying principles involved and helps foster an intuitive understanding of why things work the way they do. Readers will find themselves coaxed into learning because they want to satisfy their curiosity as they examine each puzzle. . . . [A]n excellent resource for understanding some less-obvious principles of physics. (William Baer Library Journal )

Each chapter can be read in a few minutes time, say while you are drinking a cup of tea or coffee. It will give you a lot of inspiration to challenge or entertain your friends during a reception or another get-together with some different kind of beverages. Of course you will impress them only when they haven't read the book themselves already. Hence make sure that you are the first. (Adhemar Bultheel European Mathematical Society )

Mathematician Levi has assembled a fascinating collection of 77 puzzles, some clever new originals and some twists to old ones that challenge physical intuition. . . . [A] pleasurable challenge. (Choice )

Quite how a falling cat manages to land on its feet is a classic conundrum for undergraduate students of physics. Levi presents this and other puzzles, with a few clues to how to go about solving them using only high-school mathematics. He explains all the necessary physics concepts in the appendix too. (Nature Physics )

Why Cats Land On Their Feet relies on a novel approach to problem solving that is not based on mathematics, but on models and physical intuition. . . . By looking beyond formulas and equations, Levi's goal is to provide readers who have a familiarity with basic high-school math and physics with critical thinking skills that can be applied to a range of physics problems beyond the book. (Mechanical Engineering-CIME )

Levi uses titillating puzzles and a humorous tone to truly infuse fun into the book. A must have for anyone that likes physics, or for that matter hates. Why Cats Land On Their Feet is a book that introduces the reader to the cool side of physics and then engages for hours. (Sarthak Shankar Organiser )

From the Back Cover

"Why Cats Land on Their Feet is a collection of fun physical puzzles that will be attractive to a wide spectrum of readers, from teachers to those looking simply for good reading and educational entertainment. Levi's sense of humor and friendly, informal style add to the pleasure of the book. Each of these puzzles, without exception, kept my attention."--Paul J. Nahin, author of Number-Crunching: Taming Unruly Computational Problems from Mathematical Physics to Science Fiction

"Why Cats Land on Their Feet offers a trove of interesting and varied physical phenomena. Each one is clearly explained and easily understood, but many require an insightful observation for their resolution. There were any number of occasions when I fell into the trap of false assumption and was surprised by the correct reasoning, which always seemed so obvious in retrospect! A most enjoyable read."--Julian Havil, author of Impossible?: Surprising Solutions to Counterintuitive Conundrums


Inside This Book (Learn More)
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Front Cover | Copyright | Table of Contents | Excerpt | Index
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Amazon.com: 4.4 out of 5 stars  5 reviews
3 of 3 people found the following review helpful
5.0 out of 5 stars These puzzles teach physics 31 May 2012
By Mike Grant - Published on Amazon.com
Format:Paperback
A truly remarkable book. A unique find for lovers of puzzles and brainteasers. This book differs from typical puzzle books in that all the puzzles are focused on apparent paradoxes. That means that the solution of every paradox is not the answer you would expect. The author promises a certain result from reading this book: developing one's "physical intuition." This means having a better sense of how the world works. After working through these puzzles, one definitely comes to a clearer and more direct apprehension of physical cause and effect.

What really sets this book apart is the way the author explains physics. His focus is on explaining forces. The book is super-light on formulas, making heavy use of diagrams, and minimal math. Still, those who are more verbally-minded might enjoy Parlett's THE Book of Word Games more.

Anyone with a curious mind who was turned off by the formula-heavy approach of high school and college physics courses would do well to check out this book.
2 of 2 people found the following review helpful
5.0 out of 5 stars A very stimulating read 10 July 2012
By ERW - Published on Amazon.com
Format:Paperback|Amazon Verified Purchase
Like the previous book by Prof.Mark Levi, "The Mathematical Mechanic", this one continues to be very entertaining. Of course we all know WHY cats land on their feet. It is because they don't want to fall on their backs, but the author explains HOW they do it, and why the widely known explanation doesn't work.
By getting the explanation of mechanical paradoxes, we can better understand how we think about certain problems the wrong way. A good example is the paradox of the Coriolis force calculation.
The list of entertaining explanations is long, but getting a good intuitive understanding of the gyroscopic effect is a good enough reason to read the book.
2 of 2 people found the following review helpful
4.0 out of 5 stars Great Aha! Moments and Some Disappointments 8 Jun 2012
By G. Poirier - Published on Amazon.com
Format:Paperback
I love books like this. As soon as I saw this one, I had to buy it. Having eagerly read it, I offer the following comments.

The author presents some 76 physical problems and their solutions, some of which I found to be rather unexpected. He uses mostly words in his solutions, often backed up with some more formal mathematics. In my opinion, many of these problems/solutions are very enlightening, intriguing and a great pleasure to go through. Unfortunately, I also found that some of the more wordy solutions were rather unclear (to me) and some were even a bit awkward - perhaps the result of not enough mathematics (?) This is unfortunate, especially if the results may hold surprises or may be counterintuitive; in such cases, I believe that one should strive for the utmost clarity, even if it means using a little bit more mathematics.

The author writes in a very friendly and lively style with the occasional bit of well-placed humor. Overall, I did enjoy this book and recommend it. It should appeal mainly to science/math enthusiasts.
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