I can't seem to attach a file so I am pasting the text in here. NOTE: the bold letters have ARROWS ON TOP.
Notation and units Students often have a hard time keeping track of which quantities are vectors and which are not. We use boldface italic symbols with an arrow on top for vector quantities, such as v, a, and F; unit vectors such as i, have a caret on top. Boldface +, —, x, and = signs are used in vector equations to emphasize the distinction between vector and scalar mathematical operations.
SI units are used exclusively (English unit conversions are included where appropriate). The joule is used as the standard unit of energy of all forms, including heat.