$\begin{array}{l} m\overrightarrow a = \overrightarrow F \\ \Leftrightarrow m\dfrac{{\Delta \overrightarrow v }}{{\Delta t}} = \overrightarrow F \\ \Leftrightarrow m\Delta \overrightarrow v = \overrightarrow F .\Delta t\\ \Leftrightarrow \Delta \overrightarrow p = \overrightarrow F .\Delta t\left( {dpcm} \right) \end{array}$
