00:01
A force is a vector.
00:03
What is a vector? it is any quantity that has both a magnitude and a direction, and we usually think about it as being in real space, not complex space.
00:22
So if we think about why a force must have both a magnitude and direction, imagine three different situations.
00:30
So there's a box sitting on the floor and a person comes in, they can push on it from the left, 10 newtons, or they can push on it from the right, 10 newtons.
00:54
Or they can sit on top of the box, 10 newtons.
01:03
Well, actually, their weight would then be forced onto that box.
01:08
Or they can try to lift it up, let's say 10 newtons.
01:16
So there's a variety of forces all with the same magnitude except for that person's weight, unless they're a very small person...