Unformatted text preview: quantities include the temperature, your weight, or the population of a country; these are scalars because they are completely defined by a single number (with appropriate units). Examples of Vector Quantities However, consider a velocity. If we say that a car is going 70 km/hour, we have not completely specified its motion, because we have not specified the direction that it is going. Thus, velocity is an example of a vector quantity. A vector generally requires more than one number to specify it; in this example we could give the magnitude of the velocity (70km/hour), a compass heading to specify the direction (say 30 degrees from North), and an number giving the vertical angle with respect to the Earth's surface (zero degrees except in chase scenes from action movies!). The adjacent figure shows a typical coordinate system for specifying a vector in terms of a length r and two angles, theta and phi ....
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 Fall '10
 MonicaOyola
 Anthropology, Acceleration, Force, Velocity, Euclidean vector, quantities

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