F = dp/dt = d(mv)/dt = m(dv/dt) + v(dm/dt) = a + v(dm/dt)(adsbygoogle = window.adsbygoogle || []).push({});

i dont understand why d(mv)/dt = m(dv/dt) + v(dm/dt)

can somone help ?

TNX !

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: The generalization of Newton's 2nd Law to apply to variable mass systems

**Physics Forums | Science Articles, Homework Help, Discussion**