This is an extract of "Appendix A" in my manuscript on a new theory which can be accessed through the link in my profile if someone would be interested.
The real Equation of Force is F = ma
Today's Physics is stating that the Equation of Force is F = dp/dt.
We will analyze the equation of motion of rockets to see that the real Equation of Force is:
F = ma
A rocket has variable mass in its trajectory and it's important to see its motion equation.
Let m be its variable mass at any instant in its movement composed by the mass of the rocket plus the mass of its contained fuel.
I have made a search in the internet about rocket motion equations and all the sites agree in the equation:
F = m(dv/dt) = –ve(dm/dt) where ve is the speed of the fuel expelled relative to the rocket.
One web site:
They all agree that the force acting on the rocket is due to the expelled mass and is F = –ve(dm/dt) and that the equation of motion is F = m(dv/dt) = ma.
I assume the equation have been completely verified experimentally with enough precision from a long time ago.
It is evident that it is used the equation:
F = ma
for the force and not:
F = dp/dt
... ... …
This indicates that today's Physics is wrong stating the Equation of Force as F = dp/dt.
The right equation for force is F = ma even when mass varies.
Note that the natural derivation of the famous equation E = mc2 by Relativity Theory has no sense since it is based in the wrong relation F = dp/dt (http://www.emc2-expl...tm#.XVBNlvZFyM8).
Relativity Theory becomes a wrong theory since it is based on a wrong law.
Edited by martillo, 11 August 2019 - 12:20 PM.