The discussion centers on the dual nature of gravity, where it can be perceived both as a force and not as a force, depending on the context. Participants highlight that NASA employs Newtonian gravity for practical calculations, while general relativity (GR) is essential for understanding gravity in massive systems like galaxies. The conversation emphasizes that gravity is a distortion of spacetime in GR, making it more accurate for larger masses. Ultimately, the consensus is that gravity's classification depends on the model used, with Newtonian physics being simpler but limited compared to the complexities of general relativity.
PREREQUISITESThis discussion is beneficial for physicists, students of physics, and anyone interested in the foundational concepts of gravity and its interpretations in both classical and modern physics.
jbriggs444 said:In science, if you can never detect it, you can safely ignore it and let Occam's razor cut it away.
Demystifier said:Before dealing with gravity and general relativity, one should ask and answer an analogous question in Newtonian mechanics: Is inertial force a force or not a force? After answering that one, the gravity case is conceptually much easier.