Is Gravity a Force?

Albert Einstein taught us that gravity is not a force. But what does this really mean? In this video I explain the difference between mass and weight, and how Newton and Einstein differ in their notion of "acceleration" and "force". The difference was indeed well illustrated by Einstein himself in his famous thought experiment of the elevator, that is the basis of the equivalence principle. Don't know what the equivalence principle is? Don't worry, I explain that too -- and all in only 4 minutes.

Support me on Patreon: https://www.patreon.com/Sabine

Видео Is Gravity a Force? канала Sabine Hossenfelder