[Script Info]
Title: 
[Events]
Format: Layer, Start, End, Style, Name, MarginL, MarginR, MarginV, Effect, Text
Dialogue: 0,0:00:06.77,0:00:11.73,Default,,0000,0000,0000,,Cordless earbuds are convenient.
Dialogue: 0,0:00:12.90,0:00:17.90,Default,,0000,0000,0000,,When earbuds get caught on something,
Dialogue: 0,0:00:19.13,0:00:24.80,Default,,0000,0000,0000,,they'll come flying out of your ears, but
Dialogue: 0,0:00:25.97,0:00:32.20,Default,,0000,0000,0000,,otherwise, they usually stay in your ears well enough.
Dialogue: 0,0:00:32.87,0:00:38.17,Default,,0000,0000,0000,,Even doing a spin is totally fine
Dialogue: 0,0:00:41.83,0:00:47.47,Default,,0000,0000,0000,,But if you keep spinning faster and faster...
Dialogue: 0,0:00:50.10,0:00:57.90,Default,,0000,0000,0000,,Eventually, your centrifugal force \Nshould be able to pull out your earbuds.
Dialogue: 0,0:00:59.03,0:01:05.34,Default,,0000,0000,0000,,So how fast would you have to spin\Nfor your earbuds to fall out?
Dialogue: 0,0:01:05.35,0:01:07.62,Default,,0000,0000,0000,,Centrifugal force is determined by mrω²
Dialogue: 0,0:01:07.62,0:01:13.73,Default,,0000,0000,0000,,m = mass of an earbud\Nr = radius (earbud's distance from the axis)\Nω = angular velocity
Dialogue: 0,0:01:13.73,0:01:20.23,Default,,0000,0000,0000,,First, measure the force required to remove the earbuds.
Dialogue: 0,0:01:20.23,0:01:26.53,Default,,0000,0000,0000,,I used this spring scale to measure it.
Dialogue: 0,0:01:27.93,0:01:34.43,Default,,0000,0000,0000,,Make sure that your earbuds'\Ntip covers are on correctly
Dialogue: 0,0:01:34.80,0:01:40.83,Default,,0000,0000,0000,,Pull straight
Dialogue: 0,0:01:41.70,0:01:49.47,Default,,0000,0000,0000,,It took 0.73 newtons to remove the earbud.\N(plus or minus 0.007)
Dialogue: 0,0:01:50.03,0:01:56.20,Default,,0000,0000,0000,,So if we take one 5.4g earbud
Dialogue: 0,0:01:56.20,0:02:02.50,Default,,0000,0000,0000,,and gradually increase its weight...
Dialogue: 0,0:02:05.27,0:02:12.87,Default,,0000,0000,0000,,it should separate when it goes above 74g,\Nwhich is about the weight of a large egg.
Dialogue: 0,0:02:12.87,0:02:19.07,Default,,0000,0000,0000,,Now, let's make the person wearing these earbuds spin at high speed.
Dialogue: 0,0:02:20.03,0:02:27.10,Default,,0000,0000,0000,,Keep in mind, the axis of rotation is the\Npoint directly between both earbuds.
Dialogue: 0,0:02:28.57,0:02:35.87,Default,,0000,0000,0000,,I made it a fixed axis so it won't wobble\Nno matter how fast he goes.
Dialogue: 0,0:02:35.87,0:02:44.27,Default,,0000,0000,0000,,I'm going to gradually increase\Nthe rotations per second.
Dialogue: 0,0:02:51.10,0:03:02.87,Default,,0000,0000,0000,,The earbuds fell out after passing 6.5 rotations per second.
Dialogue: 0,0:03:04.63,0:03:12.80,Default,,0000,0000,0000,,At the point of exit, the earbuds were being\Nsubjected to 13.8 Gs of force.
Dialogue: 0,0:03:14.65,0:03:22.45,Default,,0000,0000,0000,,Let's put this speed into perspective.
Dialogue: 0,0:03:23.97,0:03:30.50,Default,,0000,0000,0000,,Looking up the figure skater records for jumps,
Dialogue: 0,0:03:31.80,0:03:40.77,Default,,0000,0000,0000,,even Yuzuru Hanyu, who is going for the quadruple Axel, \Nis said to have 5.71 revolutions per second.
Dialogue: 0,0:03:40.77,0:03:45.40,Default,,0000,0000,0000,,So even a Hanyu-level spin,\Nwhich you're looking at now,
Dialogue: 0,0:03:46.57,0:03:53.10,Default,,0000,0000,0000,,it's safe to say your earbuds \Nprobably won't come out.
Dialogue: 0,0:03:54.60,0:04:00.57,Default,,0000,0000,0000,,On the other hand, the glasses (20g)...
Dialogue: 0,0:04:01.67,0:04:07.97,Default,,0000,0000,0000,,started to shift at about 0.6N.
Dialogue: 0,0:04:09.07,0:04:24.70,Default,,0000,0000,0000,,Earphones fall out > Hanyu spin > Glasses slip off
Dialogue: 0,0:04:24.70,0:04:30.67,Default,,0000,0000,0000,,So, since spinning almost definitely won't\Nmake your earbuds come out,
Dialogue: 0,0:04:32.13,0:04:38.23,Default,,0000,0000,0000,,all you have to worry about is them\Ngetting caught on something.