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I'll believe it if someone other than the Mail reports it.
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Jul 30, 2017 20:23
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Regalingualius posted:I'll believe it if someone other than the Mail reports it. https://broadly.vice.com/en_us/article/3dxga9/an-exclusive-tour-of-roosh-vs-moms-basement 
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Jul 30, 2017 20:40
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https://i.imgur.com/PF1Gb5o.gifv
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Jul 30, 2017 21:42
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MisterBibs posted:This just makes me wonder how it works when that trick is successful. Like, how do you push off without it flying backwards, as physics demands? Physics doesn't demand that. As long as you don't push back physics actually says that you'll move forward at the same rate that the skateboard does so you'll perfectly fall back down on it. Reminds me of the time the radio guys were watching some skateboard wipeout video and going "I don't understand why it doesn't always go that way! Doesn't the person have more momentum?" paying attention in physics class isn't just for nerds 
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Jul 30, 2017 22:01
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Zaphod42 posted:Physics doesn't demand that. As long as you don't push back physics actually says that you'll move forward at the same rate that the skateboard does so you'll perfectly fall back down on it. Goons. I can't ollie okay I admit it. I shouldn't disparage a woman doing possibly a comedy youtube or possibly losing whatever remaining teeth she has left. http://www.urbandictionary.com/define.php?term=Olley That's the uh maneuver as I understand it.
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Jul 30, 2017 22:06
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https://www.youtube.com/watch?v=87tBcOKTH2c&t=25s 20 minutes of "psychics" not knowing what they are doing.  some swearing.
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Jul 30, 2017 22:06
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Because of conservation of momentum the skateboard does actually Edit: no wait the board speeds up. The now airborne rider is what slows down. I'm a biologist it's been a long time since I last had to do physics 101 thought experiments 
Mak0rz has a new favorite as of 22:14 on Jul 30, 2017 |
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Jul 30, 2017 22:09
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Mak0rz posted:Because of conservation of momentum the skateboard does actually So after my feet leave the board, what force is acting on the board that's causing it to accelerate?
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Jul 30, 2017 22:26
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Gravity
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Jul 30, 2017 22:31
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Mak0rz posted:Because of conservation of momentum the skateboard does actually No it doesn't. Everything moves at constant speed because the momentum effects your speed based on your mass, and the momentum is a factor of mass. Its all balanced out. The skateboard would slow down over time because of sliding friction, but you're going to fall back on the board before it makes a huge difference. evobatman posted:So after my feet leave the board, what force is acting on the board that's causing it to accelerate? The board doesn't accelerate, nor do you. Both of you have constant velocity, with only sliding friction / drag to slow you down. Oh my god.
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Jul 30, 2017 22:31
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MOmentum stays the same but there's less weight pushing it down so there's less gravity so it speeds up
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Jul 30, 2017 22:31
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evobatman posted:So after my feet leave the board, what force is acting on the board that's causing it to accelerate? Gravity and the (sloping) ground.
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Jul 30, 2017 22:32
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a cow posted:Gravity and the (sloping) ground. You can do an ollie or other skateboard jump tricks even on level ground, as long as you've pedaled the board up to a decent speed already. You don't need gravity at all. The x motion and y motion are completely independent.
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Jul 30, 2017 22:33
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On level ground they may be.
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Jul 30, 2017 22:39
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(eight pages of bad physics discussion) "Good enough for me, hold my beer!" https://twitter.com/HoldThisBeer/status/891535627316994048
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Jul 30, 2017 22:41
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Memento posted:(eight pages of bad physics discussion) Jesus that's a hell of a way to gently caress up your back 
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Jul 30, 2017 22:42
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*Should have refreshed
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Jul 30, 2017 22:43
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evobatman posted:So after my feet leave the board, what force is acting on the board that's causing it to accelerate? e: (gonna edit this, because I'm pretty sure I'm wrong, just a sec) Okay, I said: quote:As I understand it, it's not a forward force acting on the board, it's a "backward" force ceasing to act on the board: friction. Your mass on the board causes additional friction between the trucks and the wheels and between the wheels and the ground. That last bit is where I'm pretty sure I got it wrong. You separate the rider from the board when the rider jumps, which means you have to frame the whole system like this: p = (mskateboard + mrider)v - (Fskateboard + Frider) When you remove the rider (because the rider's jumped over an obstacle and let the board go under) you remove the rider's contribution to the mass and the rider's contribution to the friction: p = (mskateboard)v - (Fskateboard) Since the ratio of the skateboard's mass to the skateboard's contribution to the friction remains the same, velocity remains the same. SneezeOfTheDecade has a new favorite as of 22:55 on Jul 30, 2017 |
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Jul 30, 2017 22:43
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what if you're trying to ollie on a treadmill?
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Jul 30, 2017 22:52
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Dillbag posted:what if you're trying to ollie on a treadmill? The skateboard takes off anyway.
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Jul 30, 2017 22:56
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Zaphod42 posted:No it doesn't. Everything moves at constant speed because the momentum effects your speed based on your mass, and the momentum is a factor of mass. Its all balanced out. Yeeeah I'll admit hosed that one up lmao. I was thinking "conservation of momentum means that the board has to maintain the same momentum as the whole human-board system once separated from the human" but that's absolutely ridiculous now that I think about it because a: why on earth would the board alone need to conserve the whole system's momentum and b: an 8lb skateboard would have to go pretty loving fast to match the momentum of a 200lb human. So yeah clearly I'm misremembering that thought experiment. Whoops!
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Jul 30, 2017 23:04
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a cow posted:Gravity and the (sloping) ground. I felt bad for my joke now I just feel bad for you 
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Jul 30, 2017 23:11
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Malachite_Dragon posted:For the same reason loss prevention at big box stores aren't (in most places) actually allowed to stop thieves; if you do anything that could get the company in legal hot water for any reason, self defense or no, that's a firin'. 'Murica! Not really. You have to be able to move people out of clubs when they don't want to leave without hurting anyone or drawing attention to it. Physically throwing violent customers out the door is occasionally part of the job. Getting to know the cops who usually respond to things like bar fights is also part of the job. So if you're a lovely, aggressive bouncer and you develop a reputation and push some drunk regulars into a fight because you haven't really gotten along in a while, and you think everyone's going to side with you, you might end up being wrong. You might get fired, charges might be pressed (even if you really were just defending yourself he wasn't) and bad things might happen. If you're a dependable bouncer who knows how to de-escalate drunk people and you do better than half rear end the customer service side with regulars and such (everyone who does it more than 6 months, generally) everyone will line up behind you if a fight starts and you get involved somehow. Something like this with a gun to your chest on video and the instant reaction? Everyone sings the "legal self defense" song and some dude you flopped on the pavement in front of the "This is my third bar tonight" crowd goes to jail to think about what an idiot he is.
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Jul 30, 2017 23:14
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I assume they're wearing steel toed boots since the guy is laughing rather than holding his broken toe(s).
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Jul 30, 2017 23:37
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I'm happy to be wrong  it should say something about the state of employment in the US that my first instinct is to go "Dude probably got fired" rather than "Dude got congratulated for doing his job".
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Jul 30, 2017 23:38
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Besesoth posted:That last bit is where I'm pretty sure I got it wrong. You separate the rider from the board when the rider jumps, which means you have to frame the whole system like this: That's what I said 
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Jul 31, 2017 00:09
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Jul 31, 2017 00:32
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Malachite_Dragon posted:I'm happy to be wrong Go learn some BJJ or wrestling or something and get the gently caress out of lot guarding. Bouncing is where it's at for security (source: I worked in security for 4+ years paying my way through community college). Some schaden to contribute: the absolute worst people on earth to deal with are white women. Bikers, gangsters, frat boys, etc all pale in comparison to how bad a lovely drunk white chick will ruin your night.
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Jul 31, 2017 00:50
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In non physics schadenfreude it's going to be the hottest it's ever been in western washington this week 
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Jul 31, 2017 01:34
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Not sure how to embed tumblr videos... http://gif87a-com.tumblr.com/post/163286699806
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Jul 31, 2017 01:35
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Zaphod42 posted:You can do an ollie or other skateboard jump tricks even on level ground, as long as you've pedaled the board up to a decent speed already. You don't need gravity at all. You can't pedal a skateboard but you can push yourself. I don't know why you people are trying to make hippy jumps more complicated than they are. https://www.youtube.com/watch?v=hDAEq1tgloU
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Jul 31, 2017 01:49
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AlmightyBob posted:In non physics schadenfreude it's going to be the hottest it's ever been in western washington this week 46° north and it's going to be 109. That's insane.
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Jul 31, 2017 01:59
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https://twitter.com/nathanTbernard/status/891722704381988865
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Jul 31, 2017 02:09
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What the hell is #GorillaMindset?
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Jul 31, 2017 02:11
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Ultimate Shrek Fan posted:What the hell is #GorillaMindset? Let me explain: https://www.youtube.com/watch?v=AcXC9o9mRdg Now no kidding: Gorilla Mindset is a book by the guy above, full of MRA stuff. I'll let this review do the talking (also pretty good schadenfreude in itself): 
nerdz has a new favorite as of 02:20 on Jul 31, 2017 |
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Jul 31, 2017 02:15
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[quote="“Memento”" post="“474881947”"] 46° north and it’s going to be 109. That’s insane. [/quote] But it’s a wet heat.
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Jul 31, 2017 02:24
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Krispy Kareem posted:But it’s a wet heat. The forecast for Thursday calls for 109° and 27% humidity. Comparably, it's going to be 106° and 32% humidity in Phoeniz, AZ on Tuesday.
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Jul 31, 2017 02:29
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nerdz posted:Let me explain: Ooooh that's the good stuff.
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Jul 31, 2017 02:34
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mobby_6kl posted:If you enjoyed that video you should definitely check out the one I posted a few pages ago as well, just make sure to slow it down to 0.25x: https://www.youtube.com/watch?v=9gnRJz1zHoE Also aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaahhhhhhhhhhhhhhhhhh
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Jul 31, 2017 02:50
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Memento posted:The forecast for Thursday calls for 109° and 27% humidity. Comparably, it's going to be 106° and 32% humidity in Phoeniz, AZ on Tuesday. Central Florida here, tomorrow's high will be 83F with 82% humidity, and Tuesday is roughly the same.
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Jul 31, 2017 02:54
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