randomaccount43543@lemmy.world to xkcd@lemmy.worldEnglish · 7 months agoxkcd #2935: Ocean Loopimgs.xkcd.comimagemessage-square23fedilinkarrow-up1605arrow-down113file-text
arrow-up1592arrow-down1imagexkcd #2935: Ocean Loopimgs.xkcd.comrandomaccount43543@lemmy.world to xkcd@lemmy.worldEnglish · 7 months agomessage-square23fedilinkfile-text
https://xkcd.com/2935 Alt text: I can’t believe they wouldn’t even let me hold a vote among the passengers about whether to try the loop.
minus-squareTimewornTraveler@lemm.eelinkfedilinkEnglisharrow-up1·7 months agoso mass doesn’t factor into the equation??? a Jetski made from aluminum would need the same speed as from osmium?
minus-squarerenormalizer@feddit.delinkfedilinkEnglisharrow-up1·7 months agoI think so. At the apex of the loop gravity balances centrifugal force, Fg = Fc, when going the minimal speed necessary to get through the loop. Fg = m g, Fc = m v^2 / r. So mass m drops out of the equation.
so mass doesn’t factor into the equation??? a Jetski made from aluminum would need the same speed as from osmium?
I think so. At the apex of the loop gravity balances centrifugal force, Fg = Fc, when going the minimal speed necessary to get through the loop. Fg = m g, Fc = m v^2 / r. So mass m drops out of the equation.