Question

Rocket Science,


Who can solve this problem ?

https://www.dropbox.com/s/j4j8wy3nwea87fg/Screenshot%202015-12-23%2015.33.13.png?dl=0

Answer 1

\[p = mv\]\[F = \dot p=\dot mv+m\dot v\]

Answer 2

and F = 0 if you look purely at the rocket/fuel system

Answer 3

personally, i'd do it like this,
https://en.wikipedia.org/wiki/Tsiolkovsky_rocket_equation

though i'd be careful as i think \(v_e\) can be absolute or relative, the latter being the case in your question......