# rocket

1. ### How to model a rocket equation from the derivative of momentum?

I am using the derivative of momentum (dp/dt) with Newton’s 3rd Law with the gravitational force of Earth. F - [Force of gravity on rocket] = dp/dt F - (G * m_e * m_r / r2 ) = v * dm/dt + ma F = Force created by fuel (at time t) G = Gravitational Constant m_e = Mass of Earth m_r = Mass of...
2. ### Solving the Rocket Pendulum Fallacy?

I have been researching the rocket pendulum fallacy and have gotten into some spirited debate on the subject. If I understand correctly... 1. if the thrust is perfectly in line with the centerline (and no outside forces act on the craft other than gravity) it does not matter where the source...

29. ### How to calculate force exerted by ground

1. Homework Statement Force exerted by the ground on the rocket Mass of the Rocket = 1500kg Duration of landing impact = 0.04 s Velocity at time of impact = 175 m/s Distance travelled = 30km Time taken to complete journey = 6 minutes Acceleration due to gravity = 9.8 m/s^2 2. Homework...
30. ### Rocket meaning - definition

I was wondering if there is an actual definition given by a recognised organisation over what is meant by the word "rocket". In case there is not, I wanted to reflect upon what do we really mean when we say rockets.