Force

Definition: Force

Force is a vector quantity which characterises an interaction between two physical objects.

NOTATION

$$\mathbf{F}\mathbf{F}\vec{F}$$

Unit of Measurement: Newton

The SI-Unit for the magnitude of a force is the Newton.

$$\left[\mathrm{N}=\frac{\mathrm{kg}\cdot \mathrm{m}}{{\mathrm{s}}^2}\right]$$

Empirical Law: Superposition Principle for Forces

All forces ${\mathbf{F}}_1,\cdots ,{\mathbf{F}}_n$ exerted on a particle at the same time have the same effect as if only a single resultant or net force $\mathbf{F}$ were at play, which is the vector sum of all other forces:

$$\mathbf{F}=\sum _i{\mathbf{F}}_i$$