Gravity doesn't make things fall (directly)

Video Description

Today we're talking about gravity! From classical Newtonian gravity to General Relativity, I want to explain a key bit of physics called the equivalence principle: Why gravitational mass and inertial mass have the same value, or said differently, why heavy things are hard to push. The primary trick here is that general relativity allows us to predict "where to put the camera" to define an inertial reference frame. Unfortunately for my sanity, "where to put the camera" is "in freefall", and I'm using my very nice highspeed camera… Hope you enjoy! Huge thanks to Dr. Ortega from Universidad de Zaragoza who provided some excellent advice and review, Dr. Ji for forwarding along some helpful lecture notes, and Patreon supporter Symhat who was the only one to realized I wrote "INERTA" in giant block letters across the whole screen about a minute in. Also massive thanks to my top Patreon supporters! birdiesnbritts John Sosa Trustham Vladimir Shklovsky Aloysius Sparglepartz Jason Whatley Lohann Paterno Coutinho Ferreira nothings Eugene Pakhomov Glenn Willen R520 Nick F Mirko Rener Chris Connett Tyler Filla Chandler Freeman Benjamin Manns MPG Seth Reuter Danny Thomas Lucy Fur tiaz David Antoš Chris Duvarney Nick Wage John T Jack Serrino Ethan Sifferman Dit55 Ashley Hauck Scott Schlesier Steve James K Allan Adams Usama Cody and Sara Doug Strain Justin McCaskill Azurethi Gregory M Nathan Andrew C Ellis Driscoll AhmedTBD b1gg33k nicktohzyu Music in this video: I Dunno by grapes is licensed under a Creative Commons Attribution license (https://creativecommons.org/licenses/by/3.0/) http://ccmixter.org/files/grapes/16626 Gymnopedie No 1 by Kevin MacLeod is licensed under a Creative Commons Attribution 4.0 license. https://creativecommons.org/licenses/by/4.0/ BoogieBounce by Drew Banga - YouTube Audio Library License New Land by ALBIS - YouTube Audio Library License