Hellow guys, Welcome to my website, and you are watching Gravity Is Not a Force (And The Acceleration Is Upwards!). and this vIdeo is uploaded by EdwardCurrent at 2020-01-01T16:24:53-08:00. We are pramote this video only for entertainment and educational perpose only. So, I hop you like our website.
| Name | Gravity Is Not a Force (And The Acceleration Is Upwards!) |
| Video Uploader | Video From EdwardCurrent |
| Upload Date | This Video Uploaded At 02-01-2020 00:24:53 |
| Video Discription | Before you leave a comment that this video is wrong or I am a flat Earther or that this could only be true if the Earth is expanding (see below), stop yourself. It's 100% consistent with textbook general relativity, and there's nothing inaccurate about the claim that Earth's surface is accelerating upwards. So, if you were about to leave such a comment, you'll need to come to terms with this highly counterintuitive aspect of physics' best theory of gravity. The video is part of a series, a provocative introduction to GR. To dive in deeper, I suggest some other videos: 1. My more recent and more comprehensive GR explainer, "How Curved Spacetime Works": https://youtu.be/ZccTTUX-dBc 2. An experiment you can do at home to confirm that you are indeed accelerating upwards: https://youtu.be/_GjIgJPn47E 3. A look at the differences between Newtonian gravity and general relativity: https://youtu.be/CjHaifmdNZg 4. The video that started the series and won a physics prize, “How Gravity Makes Things Fall”: https://youtu.be/jlTVIMOix3I 5. If none of that will convince you, maybe Derek Muller/Veritasium's highly similar video but much flashier (released a few months after mine), in which he says, "You are accelerating upwards!": https://youtu.be/XRr1kaXKBsU #1 question asked by viewers: If the surface is accelerating "upward" in all directions around the globe, doesn't that mean the Earth is expanding? Answer: No. Acceleration does not necessarily mean "speeding up" like how a car can speed up when you step on the gas. An analogy presented in this video is a rotating wheel: The points along its edge are constantly accelerating toward the center (centripetal acceleration, discussed at 4:21) — but the wheel is not shrinking or getting crushed. However, gravity has nothing to do with rotation. What actually happens in a place where there's gravity is that spacetime is curved, and you have to be accelerated just to stay in place. This will be clearer if you watch "How Curved Spacetime Works," https://youtu.be/ZccTTUX-dBc . Some physics cranks DO believe that gravity is explained intuitively by a constant expansion of the Earth. But the pseudoscience of "expansion gravity" cannot explain elliptical orbits, hyperbolic trajectories, and the relation between surface gravity, radius, and density. It’s also wildly in conflict with experiments and the accepted calculations of celestial bodies’ surface gravities. Just think of gravity as a kind of acceleration-in-place that appears as the more familiar (upward) speeding-up acceleration to observers that are free to move inertially. Thank you for supporting me on Patreon! patreon.com/edwardcurrent |
| Category | Science & Technology |
| Tags | general relativity | einstein | gravity | spacetime curvature | four dimensions | time | space | space and time | gravitation | acceleration | edward current | centripetal force | normal force |
