![]() Make sure to use the notation your professor prefers. Realize that you will see all three notations, depending on your textbook, online resource, and professor. My personal preference is to just write the letter, I do this because it I treat the magnitude of the vector as a variable in my equations. The term direction vector, commonly denoted as d, is used to describe a unit vector being used to represent spatial direction and relative direction. Think of this as an absolute value sign, removing the direction. Use standard notations for vectors Represent vectors graphically in two dimensions as directed line segments Define unit vectors as vectors of magnitude 1. But if you see i, and not in the imaginary number sense, you should realize that that's the unit vector. ![]() Sometimes in the book, you'll see this i without the cap, and it's just boldface. Showing that adding the x- and y- components of two vectors is equivalent to adding the vectors. We denote the unit vector by putting this little cap on top of it. Vector NotationĪs mentioned earlier, you can represent a vector by picking a convenient letter, like d for a displacement vector, and place a small arrow above it, resulting in \(\color\) also works. The blue and red vectors are the horizontal and vertical components respectively of the purple. Unit Vector Notation (part 2): More on unit vector notation. ![]() For the moment, we’ll introduce a simple notation, and then expand on it later. If you pursue a degree in physics, you might learn several different notations.
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