Recent content by oOoOoOo

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    Principle of linear momentum for a rocket

    I finally got my mistake. Thank you, very much.
  2. O

    Principle of linear momentum for a rocket

    So then my assumption $$\Delta v=a*\Delta t \text{ where } a=\frac{F-G}{m}$$ is wrong, because I am only interested in the acceleration and Δv which came from the thrust only?
  3. O

    Principle of linear momentum for a rocket

    Maybe I wasn't clear enough, given are thrust, Δm and the total mass. So to calculate the relative velocity w $$ w=-\frac{F}{\Delta m / \Delta t} $$ could be used, I know that, but I would prefer to calculate it with the conservation of linear momentum, since I try to explain the concept. The...
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    Principle of linear momentum for a rocket

    Homework Statement vertical rocket start: F_thrust (simple F) Δm (fuel consumed per Δt) m_tot the relative velocity of the gas w is demanded. Homework Equations vgas=v+Δv+w, w<0 m(t)=mtot-Δm*t The Attempt at a Solution rocket acceleration. F-G=m(t)*a(t) a(t)=F/m(t)-g first...