What is magnitude - like in a vector?

Answer 1

Here's a vector: "30 miles an hour, going north"

The name of that vector is "velocity". It has a magnitude and a direction. The

magnitude of this velocity is 30 miles an hour. We usually call that "speed".

The direction of this velocity is "north".

The magnitude tells how big the vector is. The direction tells which way it points.

"30 miles an hour" is not a velocity. It's a speed. Speed is only the magnitude of

a velocity vector, because it has no direction. Once we know the direction, we can

put it together with the magnitude, and we'll have a vector, called "velocity".

Answer 2

Magnitude in a vector represents the size or length of the vector. It is a scalar quantity that measures the extent of the vector without considering its direction. It is usually denoted by ||v|| or |v|.