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equivalence_principle [2024/05/18 15:52]
scox 		equivalence_principle [2024/05/19 20:54] (current)
scox [Constant Acceleration Feels Like Gravity]
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 As astronauts prepared for the Moon landings, they experienced many different conditions which impacted their normal experience of gravity. As astronauts prepared for the Moon landings, they experienced many different conditions which impacted their normal experience of gravity.
 +
 +===== Free Fall Feels Like Zero-Gravity =====
  
 While they orbited the Earth, they were under the influence of gravity (no straight line motion, right?) but felt weightless.  We sometimes call this zero-gravity, but of course, we didn't cancel the Earth's gravitational field--we just let the astronauts "go with it".  When you think about it, we don't "feel" gravity, we feel the force that opposes gravity to keep our net force equal to zero.  We feel the contact force (or normal force) that comes from the floor, or our seat.  Take away the normal force, and we feel weightless, as you can see in the following scenarios: While they orbited the Earth, they were under the influence of gravity (no straight line motion, right?) but felt weightless.  We sometimes call this zero-gravity, but of course, we didn't cancel the Earth's gravitational field--we just let the astronauts "go with it".  When you think about it, we don't "feel" gravity, we feel the force that opposes gravity to keep our net force equal to zero.  We feel the contact force (or normal force) that comes from the floor, or our seat.  Take away the normal force, and we feel weightless, as you can see in the following scenarios:
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   * Scenario 4: OK Go Video. [[https://youtube.com/clip/UgkxYTe-dMLd4ulpqHUCPz-vwLW1Iad6dNGH?si=aM0Bsv60LF1cOiFK|Zero-Gravity Parabola]] ; [[https://youtu.be/LWGJA9i18Co?si=1wBYZ0p745ovMnVu|Full Video (3:22)]] ; [[https://youtu.be/YwyXLBQUEC0?si=a9hgEq48PoJCJpsU|Full Documentary (19:39)]]   * Scenario 4: OK Go Video. [[https://youtube.com/clip/UgkxYTe-dMLd4ulpqHUCPz-vwLW1Iad6dNGH?si=aM0Bsv60LF1cOiFK|Zero-Gravity Parabola]] ; [[https://youtu.be/LWGJA9i18Co?si=1wBYZ0p745ovMnVu|Full Video (3:22)]] ; [[https://youtu.be/YwyXLBQUEC0?si=a9hgEq48PoJCJpsU|Full Documentary (19:39)]]
   * Scenario 5: 2001: A Space Odyssey. [[https://youtube.com/clip/UgkxAgfcsoQYyMqe7vo8pPl5R5S_Wg3EdFQV?si=hlo8t9LqIe8a40N-|Velcro Shoes Clip]] ; [[https://youtu.be/0ZoSYsNADtY?si=dn3h4qbxcSjtdxdq|Full "Waltz" Scene (4:20)]]   * Scenario 5: 2001: A Space Odyssey. [[https://youtube.com/clip/UgkxAgfcsoQYyMqe7vo8pPl5R5S_Wg3EdFQV?si=hlo8t9LqIe8a40N-|Velcro Shoes Clip]] ; [[https://youtu.be/0ZoSYsNADtY?si=dn3h4qbxcSjtdxdq|Full "Waltz" Scene (4:20)]]
-  * Scenario 6: Astrosmiles. [[https://youtube.com/clip/UgkxmfS1IBB0ZKusU9zRkFkHVgHNaS47nUmT?si=iLlYaVPif1knN9kF|Eating Clip]] ; [[https://youtube.com/clip/UgkxseCL8jr79wQSBkd4bQZKLyBEQHvsdrzP?si=R4x0lj3tkHUASDEH|M&M Clip]] ; [[https://youtu.be/5hNAiABnSE0?si=Bn1oo2M5iSvoS0u8|Full Video (24:52)]] +  * Scenario 6: Astrosmiles. [[https://youtube.com/clip/UgkxmfS1IBB0ZKusU9zRkFkHVgHNaS47nUmT?si=iLlYaVPif1knN9kF|Eating Clip]] ; [[https://youtube.com/clip/UgkxseCL8jr79wQSBkd4bQZKLyBEQHvsdrzP?si=R4x0lj3tkHUASDEH|M&M Clip]] ; [[https://youtube.com/clip/UgkxDqPXBf7ggbYD37Hc6WGEVdw8cgMZzGmR?si=kPnBx0GdjEwC6ZAs|Hair Wars]] ; [[https://youtube.com/clip/UgkxHTpLE__YxarNbzd13_PycmpriyFBYlyT?si=yGJnhJu_1wxtj6ll|Down, Up, Doesn't Make Any Difference]] ; [[https://youtu.be/5hNAiABnSE0?si=Bn1oo2M5iSvoS0u8|Full Video (24:52)]] 
-  * Sce+  * Scenario 7: Diving. [[https://youtu.be/slzFkEQENu0?si=dzOxSDcKQocC0Wpb|Highest Scoring Dive Ever]] ; [[https://youtube.com/clip/UgkxgKpuN31pdMy9gm44z2PjtWhJCKOd9_i4?si=OAcxo6Ezbh_n-BJw|Acrobatics Start on the Way Up (Clip)]] 
 + 
 + 
 +===== Constant Acceleration Feels Like Gravity ===== 
 + 
 +  * Scenario 1: Rocket Sled (JP Stapp) [[https://youtu.be/HV4JzoeaWTQ?si=6VziGXTbtClyZhAL|Strapped to a Rocket, For Science]] 
 +  * Scenario 2: Astronaut Tests [[https://youtube.com/clip/UgkxnPP6ik0zVDIX_qcT5pfD_ZIICYbbWXod?si=82XTEWVdC6_bslOP|Centrifuge Spinup]] ; [[https://youtube.com/clip/UgkxdTGsKziEEm06pabQsuPnmO1OG-Hv7Q9W?si=1cLj0L28Mon3LsLO|Different G-factors]] ; [[https://youtube.com/clip/UgkxdTGsKziEEm06pabQsuPnmO1OG-Hv7Q9W?si=1cLj0L28Mon3LsLO|Longer Documentary (4:48)]] 
 +  * Scenario 3: Fighter Pilot Fails [[https://youtu.be/kUscr9kSgYM?si=AcmgYGnZWZm5hiRa|Footage of 7-G Buildup (3:18)]] 
 +  * Scenario 4: 2001: A Space Odyssey (Jupiter Mission) [[https://youtube.com/clip/Ugkxiy_6bH9uP_pDcVAJNwWmUQ44tumdKjTT?si=KU8aaFVdk06MYXEv|Centrifuge (Laps)]] ; [[https://youtube.com/clip/UgkxtpZa7Zr98vaK_28GgDLozEbhtsqH3Qta?si=0AFx-zTEe8ze3X4h|Centrifuge (Axle to Ladder)]] ; [[https://youtu.be/BtC5hTt0fbc?si=rz_kkFfc5lG8VuvC|Full Scene (4:01)]] 
 +  * Scenario 5: 2001: A Space Odyssey (Orbital Hotel) [[https://youtube.com/clip/UgkxI3Y2Q9pR7YZyv9PE-qM6d8Hx9eubK3VC?si=jW6Dm_zdajLzqhY1|Hotel Approach]] ; [[https://youtu.be/vG6CjOFlo7A?si=RxK4QwbGmetgUZ-v|Hotel Check-in]] 
 + 
 +=====Light Beams in Gravitational Fields===== 
 + 
 + 
 + 
  
 +[[https://youtube.com/playlist?list=PLxdM6s3pVhAXy7GQ-7ElO2YhjUl85HOHx&si=HaUvt5BL-TmWwfq5|Entire Equivalence Principle Playlist]]
  
equivalence_principle.1716047571.txt.gz · Last modified: 2024/05/18 15:52 by scox

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