Is Gravity a Force or Not? A Tale of Scientific Models
-
Dan MacIsaac [1]
-
[1] Physics Department, SUNY-Buffalo State University , Buffalo
-
- Localización: The Physics Teacher, ISSN 0031-921X, Vol. 62, Nº. 2, 2024, págs. 158-158
- Idioma: inglés
- Texto completo no disponible (Saber más ...)
-
Resumen
There are a number of wonderful YouTube videos that discuss whether gravity is or isn’t a force, or “a force in the classical or Newtonian sense,” etc. Herr Prof. Dr. Einstein (and his teacher Herr Prof. Dr. Minkowski) redefined gravity, and under Einstein’s model of general relativity, gravity is not a force. Sabine Hossenfelder makes a great case for this direct observation using smartphone accelerometer data (you can read your phone’s accelerometer via the free Phyphox app) and argues the case that we must accelerate while “standing still” on the surface of the Earth in a gravitational field from those very real data. Don Lincoln points out that (unvalidated) theories of quantum gravity make gravity a force yet again. Derek Muller makes a nice convincing presentation illustrating frames of reference, noninertial frames of reference, and geodesics; shows a gravitational field tensor equation; and illustrates the Eddington confirmation of Einstein’s general relativity.
