Fysica/Krachten: verschil tussen versies

|formule=<math>\boldsymbol{F} = \frac{d\Delta\vec p}{dt\Delta t} \, = \, \frac{d}{dt\Delta t} (m \vec v) \, = \, \vec v \, \frac{dm\Delta m}{dt\Delta t} + m \, \frac{d\Delta \vec v}{dt\Delta t} .</math>