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## IMPORTANT DEFINITIONS

(Skim this section before reading the book and refer back as needed.)

1. Pay attention to units. When working on a problem or equation, all the values must be in, or converted to, one system of units. All units must agree. Those units may be SI (or MKS), CGS, or British, but you cannot mix units in a given equation or problem. We will mostly use the MKS system, but will also use British for practice. In this book we will generally use abbreviations such as: seconds s, hours h, minutes min, meters m, centimeters cm, miles mi, feet ft, inches in, miles/hour mph, pounds lb, grams g, kilograms kg, slugs sl, Newtons N, Joules J, volts V.

Units can assist you in developing or solving an equation since the remaining units after ...

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