What is the difference between a scalar and a vector?

As often described, a vector is a quantity that has a magnitude and a direction, whereas a scalar just has a magnitude. The easiest way to thing about it is to physically think if you could point in a direction, for example, you cannot point to how much energy was used or which way time flowed but you can point in the direction of your speed, hence becoming a velocity.

Answered by Pavit B. Physics tutor

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