|
[QUOTE=island911;11898316]Do I?
.....
Your explanation of how Fg=mg=ma (g=a) "is backwards" seems a bit non sequitur and does not flip these relationships. Not even in Newtonian physics.
A..[/QUOTE}
Fg=mg
is just a mathematical relation between 3 things
Fg is a subset of all other forces in that it specifically names the force caused by gravity, aka weight
mass is the affected mass
g is the local acceleration caused by the local gravitational field, which for a planet varies w/ height and specifics to your location there are many causes for g to vary local mass concentrations contribute as well as the inertial spin forces which lower g at the equator of the Earth to 9.76 m/s2 and to 9.83 m/s2 at the poles
F = ma is just the more generalized superset that describes the effect of any force on a given mass
It does not specify the source of a force only its effect on one particular thing
it could correctly be written
m = f/a or a = F/m
|