Grade 12

Geometry and Algebra of Vectors

Heretofore, you have been dealing with scalar quantities. These are things like numbers, mass, length, that just have a size (magnitude). We will now formally introduce the vector. A vector is a mathematical object that has both a magnitude and a direction. Vectors are used to describe things like position, forces, weight, and hence play a big part in physics. In order to describe the direction of a vector, we need a frame of reference.

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