Unformatted text preview: Chapter 1
Introduction and Measurement What is Physics? Physics the study of matter, motion, and energy Essentially EVERYTHING Uses theory, experimentation, and the Scientific Method to explain nature. Overlaps into the fields of Biology, Chemistry, Architecture, Engineering, etc... Units, Standards, and the SI System SI (Systeme International) or Metric System internationally recognized system of units
Based on multiples of 10. Based on consistent standards Basic Units: Length meter Time second Mass kilogram Metric Prefixes Milli 1/1000 or 103 A milligram is one thousandth of a gram. A centimeter is one hundredth of a meter. A kilogram is one thousand grams. Centi 1/100 or 102 Kilo 1000 or 103 See page 9, Table 14 for a complete list Unit Conversions When working a problem, you cannot mix units. Therefore it is often necessary to convert from one unit to another. Example:
Convert 15.0 inches to centimeters. Covert 45 m to km. How many seconds are in three hours? How many cm3 are in one m3? Trig Review An understanding of trigonometry and the properties of a right triangle are extremely important to physics. Pythagorean Theorem A2+B2=C2 Trig Review The Trig functions
Sine Cosine Tangent sin = opp/hyp cos = adj/hyp tan = opp/adj Trig Review Example: Find the unknown values for the right triangle below. ...
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