Difference between revisions of "Talk:3152: Skateboard"

Explain xkcd: It's 'cause you're dumb.
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(plz someone do the math for the free fall)
(did the math)
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Has anyone done the math to see if the duration of the free fall would realistically be around 90 seconds as in the alt text? I want to believe Randall has, but the only way to know is to double-check... [[Special:Contributions/81.1.2.155|81.1.2.155]] 09:06, 9 October 2025 (UTC)
 
Has anyone done the math to see if the duration of the free fall would realistically be around 90 seconds as in the alt text? I want to believe Randall has, but the only way to know is to double-check... [[Special:Contributions/81.1.2.155|81.1.2.155]] 09:06, 9 October 2025 (UTC)
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: OK this is me again, I just found an [https://www.omnicalculator.com/physics/free-fall-air-resistance online calculator] and for an 80-kg object, 90s corresponds to a fall of 5000 m, which is apparently a reasonable skydiving altitude. Of course he doesn't call just as he jumps so take 10 more seconds, that's 6000m. [[Special:Contributions/81.1.2.155|81.1.2.155]] 09:13, 9 October 2025 (UTC)

Revision as of 09:13, 9 October 2025

Maybe Randall took inspiration for this comic from the recent Red Bull stunt with Brazilian skater Sandro Dias, who dropped from the side of a building from a height of 70 meters (that's little over 229 ft) on 25 September 2025. 2804:214:4102:575A:D862:C9B6:9505:D740 01:25, 9 October 2025 (UTC)vinnycordeiro

@vinnycordeiro, I thought of that too. [1] He was able to start in momentary free fall and make a controlled skating descent down the curve of the building (on a smooth skating ramp that had been built to exactly follow the building contour, not directly on the building's normal external surface). Although doing more than twice that height and starting at terminal velocity instead of rest would be extra-impressive. Still, Sandro Dias's achievement shows that a champion skateboarder can keep control of a skateboard with staggeringly large amounts of kinetic energy! Schoen (talk) 03:14, 9 October 2025 (UTC)

Perhaps the “wrong parachute pack” thing is just a common trope, but I was immediately reminded of the example in the Henry Stickmin Collection, where Henry survives the initial fall without a parachute just fine, but is immediately killed by the contents of the backpack falling out and onto his head. KelOfTheStars! (talk) 01:55, 9 October 2025 (UTC)

Parachute packs are secured with shoulder AND leg straps, so it's indeed very difficult to mistake them for ordinary backpacks. 194.119.24.136 08:39, 9 October 2025 (UTC)

Wait, so "gee forces" isn't some kind of weird obscure pun? - 24.177.125.170 08:51, 9 October 2025 (UTC)

Has anyone done the math to see if the duration of the free fall would realistically be around 90 seconds as in the alt text? I want to believe Randall has, but the only way to know is to double-check... 81.1.2.155 09:06, 9 October 2025 (UTC)

OK this is me again, I just found an online calculator and for an 80-kg object, 90s corresponds to a fall of 5000 m, which is apparently a reasonable skydiving altitude. Of course he doesn't call just as he jumps so take 10 more seconds, that's 6000m. 81.1.2.155 09:13, 9 October 2025 (UTC)