Considering gravity as a force completely destroys Newton’s 2nd Law. A force needs to be cause by something, so what would it be?
Considering gravity as an effect only makes the most sense to me for now.
I think it semantics on how this stuff is defined. This is why I asked the questions that I did.
If we consider gravity as a force, then what happens to Newton’s 1st and 2nd Laws? They fall apart. Plus something would still have to cause this force.
This is what messed me up.
F = ma — (I’m cool with)
a = F/m — (I’m cool with)
m = F/a — (makes no sense whatsoever)
How can two things that are results of something create a mass? That is where quantum comes in and I’m not really that deep into that.
The only way I can see gravity is it being an effect from mass. This would allow Newton’s second law to hold and supports Einstein’s theory.
But even Einstein’s theory has the same issue
E = mc^2 — I’m cool with
m = E/(c^2) — makes no sense
So we keep circling around with “what force or energy causing the creation of mass?” This is quantum level stuff we have reached.
This has always been my issue with physics. In a pure mathematical world we can not get away with half the stuff that physics get away with. We are not allowed to assume.
This confused me more. Why does considering gravity as a force completely destroys Newton’s 2nd Law? You have mass and you have acceleration.
But exactly what external elements is causing the gravity of a planet? Impossible to know. There are too many variables. But the acceleration that helps to determine this force has been measured.
"A force needs to be caused by something". Maybe a more helpful question is, physically, what causes Earth's gravitational acceleration. I don't have the answer. But if I personally want to make something accelerate, I can apply a force on it. And previously that object did not have an acceleration. I tend to believe the same for gravitational acceleration even though I can't tell you physically what it is. Maybe I should look at E = mc2 some more.




