Vector
A physical quantity characterized by both a magnitude and a spatial direction.
Governing formula
A = Ax i + Ay j + Az k
SI unit
Various
In depth
Vectors obey vector algebra rules such as vector addition via tip-to-tail, dot products, and cross products. Rotating coordinate axes changes a vector's individual components while leaving its magnitude and physical orientation invariant.
Examples in the real world
Velocity (e.g., 60 km/h North), force (e.g., 10 N downward), acceleration, magnetic field strength, and displacement.