Question

When do we take negative or positive in the formula of magnitude of resultant vector

Answer 1

Vectors are mathematical objects and we will now study some of their mathematical properties.

If two vectors have the same magnitude (size) and the same direction, then we call them equal to each other. For example, if we have two forces, F1→=20 N in the upward direction and F2→=20 N in the upward direction, then we can say that F1→=F2→.