The coin rotation paradox flummoxed SAT test writers even though we encounter this math problem every day
The 1982 SAT infamously held a math question so tricky that even its creators didn’t include a correct answer. The botch required the rescoring of 300,000 exams, scholastic victims of the knotty coin rotation paradox.
In fact, the moving quarter makes exactly two full rotations by the time it returns to its original position. The phenomenon defies common sense. If you find it hard to accept, I encourage you to test it for yourself. Any two disks of equal size will do.The version of this problem that snuck its way onto the 1982 SAT math section had a small variation: the center disk was larger than the one rolling around it.
So why is there an extra rotation? The approach that led us astray above does contain some wisdom. Rolling a quarter along a three-inch straight-line path would involve only one rotation. Likewise, a small circle rolling in a straight line with a length that is three times its diameter would rotate three times. So the circular shape of the path somehow causes a rotation of its own. To see why, imagine rolling a quarter around the perimeter of a tiny poppy seed.
Argentina Últimas Noticias, Argentina Titulares
Similar News:También puedes leer noticias similares a ésta que hemos recopilado de otras fuentes de noticias.
Nobody is talking about Guardians of the Galaxy Vol. 3, and that's a big problemGuardians of the Galaxy Vol. 3 has been playing in theaters for over a month, yet nobody is talking about it - here’s why that’s a problem.
Leer más »
Fentanyl is dominating headlines, but there’s a more comprehensive drug problem happening in TexasLawmakers are passing laws in an attempt to slow the rise in fentanyl overdoses, but drug advocates warn the opioid is mostly a booster for other illegal drugs.
Leer más »
Superhero Series Aren't The Problem But They Might Be The SolutionWhat's this I hear that folks are 'sick' of all of this superhero stuff? Has anyone told streaming yet? Because shows like PrimeVideo's TheBoys, Netflix's The UmbrellaAcademy, StreamOnMax's Peacemaker & others are proving that theory false. Opinion
Leer más »
Fentanyl tops headlines, but there’s a bigger drug problem in TexasThe synthetic opioid is rarely taken alone, and health care and law enforcement officials are dealing with multiple deadly drugs at once. Story by TexasTribune.
Leer más »
Multiple Sclerosis Has a Misdiagnosis ProblemIn the ongoing absence of a reliable biomarker for multiple sclerosis, misdiagnosis is a common, and persistent, problem that potentially puts patients at prolonged and unnecessary risk.
Leer más »