#conservation of momentum

[peeterjoot]

A kind of fun high school physics collision problem, generalized slightly.

[Click here for a PDF version of this post] fig. 1. The collision problem. Karl’s studying for his grade 12 physics final, and I picked out some problems from his text [1] for him to work on. Here’s one, fig. 1, that he made a numerical error with. I solved this two ways, the first was quick and dirty using Mathematica, so he could check his answer against a number, and then while he was working…

[monkthinker]

Check out this post… "30 MCQ based on conservation of momentum".

[truphysics]

Momentum

Introduction Momentum is a fundamental concept in physics. It is a vector quantity and is expressed classically as the product of an objects mass and velocity. Definition of Momentum The momentum $\vec{p}$ of an object can be calculated using the formula: $\vec{p} = m\vec{v}$ where $m$ is the mass of the object and $\vec{v}$ is its velocity. Conservation of Momentum One of the key…

[the-punforgiven]

Mutuals I am standing in front of you and swinging my greatsword methodically around you with finely honed technique that deters attackers from approaching either of us

[papirouge]

Mind you, they are the same people making fun of the woke left™ mob mentality and sporting Ukrainian or Palestian flag on their pfp

[thewhoodiemonarch]

battle bots but one of the fighters is a porcelain doll

thank you for coming to my ted talk

[truphysics]

Yarkovsky Effect

Introduction The Yarkovsky Effect is the force acting on a rotating body in space caused by the anisotropic emission of thermal photons (which carry momentum). This effect is named after the engineer Ivan Osipovich Yarkovsky, who first proposed the idea. This effect plays a significant role in the dynamics of small celestial bodies, such as asteroids and meteoroids. Understanding the Yarkovsky…

[quillsword]

Is Trump Going to Win Big?

My best assessment is that the race is his to lose. I think Trump would have to actively sabotage his own campaign to lose at this point. However, last I looked, I am not omniscient so I could, in fact, be wrong. Not that I’m going to let that stop me. If you wanted omniscient, you’d be praying to the Almighty, not reading my little blog, or watching a silly eagle in a BBQ apron while I ramble…

[bendgineer]

I think one of the reasons the Harris / Walz ticket has so much momentum is because the campaign is genuinely trying to put out this vibe of fun. Like that's all the "brat" thing is, the coconut jokes, just being kind of silly and fun.

And I think it's working, because let's be real, we are all exhausted. It's been all about preserving democracy, defeating fascism, the past eight years. The message has been "vote for us because the country is literally on the line". The vibes are not good when we are stuck back at that fight, and not even discussing trying to make progress on things like housing, healthcare, education, etc. And the fight to just stop fascism? All still true. Project 2025 is real and is extremely scary. We can't let that man back into office.

But the vibe was "vote for us otherwise we're all fucked :(" and now has shifted to "get in, we're making popcorn and then bullying fascists." Like a lot of the issues conservatives bring up, the Harris / Walz is just not engaging them in good faith, as they shouldn't. Republicans bring up abortion, and some of the Dems are just like, "you want 14 year old to give birth? Weirdo" and just leave it at that. Like YES, that's what you should do. Because it SHOULDNT be a debate. And it's working. This is how you defeat the identity politics thing Republicans have been trying to push for a while. Just mocking them for the stupidity of it all. "Like seriously? You think a book can make someone gay??? Hahaha." None of the Republicans are reacting well. They can't stand it. Vance even complained about bullying!!! Like do you KNOW who picked you as vp??? It's actually laughable, because they have no room to stand on when it comes to bullying.

And a huge part of the mocking and dismissing of Republicans is that the message is clear - we are done debating all this stupid stuff. We've won the last two elections' popular vote - most Americans do NOT want christo-facism. It's time to move on. And that's what gives me hope, and the feeling of hope I think a lot of people have picked up on. It's time to address all the issues we've all wished we've been addressing the past decade. It's important we move onto that, and that's the message I'm getting from this campaign (We're not going back). I think it will resonate with a lot of people, because plainly, we're all just sick of this same old news cycle and fake rage bait over things like "should women have rights?", "Should gay people be allowed to exist?" The general populace have answered YES to both these multiple times, and it is time to move on. Maybe I'm being naive, but I am genuinely excited at the idea of putting to bed these debates (it's exhausting trying to fend someone's very existence ) and moving on to actual economic and social policies that could fix a lot of deterioration over the last 2 decades.

[encyclopika]

These assholes let people - people who paid them for this fucking service - die every day. They forgot their job was to fork over money in emergencies, not play God or be the damn mafia. Fuck them, fuck that CEO, go get 'em, kid.

[the-punforgiven]

I wasn't born to live in fear of the whims of my landlord I was born to hang out with knights in a decrepit forgotten old castle that's falling apart and overgrown with vines but we're still comfortable with plenty of food a warm hearth and a functioning forge while I teach them about music and the instruments I play and they in turn while they teach me how to swing around a fuckhuge big sword Figureido style

[pinkcasket]

can't do basic velocity and acceleration vectors but I CAN do rocket problems in 20 minutes. so that says smth about me

[iwatcheditbegin]

I really hope they are smart about vp pick

[transcarcinization]

does the uncertainty principle have narrative applications? i was exposed to it as a physics thing and am having a hard time guessing how it’s possibly thematically or rhetorically relevant outside of physics

[circumlocutive]

I'm so late to this but damn optical tweezers are cool as fuck!!!