Vectors
Scalar: A quantity like mass or temperature, which only has a magnitude.
Vector: A quantity
like heat flux or force which has both a magnitude and a direction; denoted by a bold
faced character (a), an underlined character (a),
or a character with an arrow on it (
).
Resolution of a Vector: A vector can be resolved along different directions using the parallelogram rule. The figure shows how one resolves vector c into components a and b which are along the given directions (i and j are the unit vectors; vectors of unit length).
Vector Addition: Vector Addition follows the parallelogram law described in the figure.
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