Recent content by ObeseKangaroo

  1. O

    Schools Looking for students from uni Hamburg, Bonn, Jena, FU Berlin

    I am planning to apply to a MSc program in one of these universities: Hamburg (Atmospheric Science or Ocean and Climate Physics), Bonn (Astrophysics), Jena (Astrophysics), FU Berlin (Planetary Science). Are there any students on the forum who are a part of these programs and willing to answer...
  2. O

    Undergrad Is the classical ideal rocket thrust equation correct?

    I realize that if we move into the frame which has speed υ, the same speed as the rocket has in this very moment, F would in fact equal ma. But what about other frames? The force should be invariant when it comes to inertial reference frames.
  3. O

    Undergrad Is the classical ideal rocket thrust equation correct?

    Hello! I have recently found this fascinating article: https://zenodo.org/record/3596173#.YJ1ttV0o99B The author claims that classical equation for rocket thrust in incorrect because F is not equal to ma for a changing mass. Neither my professors nor me can see any errors. Do you think this...
    • ObeseKangaroo
    • Thread
    • Classical Rocket Rocket equation Rocket motion Thrust
    • Replies: 3
    • Forum: Mechanics