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Mathematics and Physics for Programmers, Second Edition by Danny Kodicek, John Patrick Flynt

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Chapter 14. Friction

Overview

Chapter 13 addressed some initial topics concerning rotation, and this chapter continues with that theme. Previous discussions dwelled on sideways spin in the game of pool but glossed over topspin and backspin, which are more common. Both topspin and backspin are usually referred to as rolling, and rolling is probably what first comes to mind when you consider what a pool ball does. The question arises, however, as to why and how a ball rolls at all. After all, if a ball were moving through empty space, it would not be expected to roll. In fact, in calculations of momentum in Chapter 13, spin was completely ignored.

A ball rolls for the same reason ...

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