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Joined 2 years ago
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Cake day: October 25th, 2023

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  • My concern is in regards to AI… I think many are relying more and more on it. Making such content a waste of my time in this perspective.

    Another way to frame this is “I don’t have anything new to add to what AI would write on the subject”.

    Don’t you? Then why are you thinking about writing a blog? Even if it’s just a documentation of your projects, it’ll be your perspective. AI can’t write that, so people who want to read your blog aren’t going to get it from AI.




  • So then if the bucket is moving in a counter clockwise direction, the “left” wall of the bucket would be the thing acting on the water. Wouldn’t that cause the water to stick to the left wall of the bucket, not the bottom?

    It might help to remember that “left” and “bottom” are different depending on where you’re standing. The water keeps moving in the direction the original force got it moving, but as the bucket traces the circular path, the “left” and “bottom” walls are now in different positions relative to the water. Remember, you don’t see the water sitting peacefully on the “bottom” of the bucket like you would if it were standing at rest; the water is forced in the “bottom left corner” of the bucket while it spins, because the water always being accelerated (by the bucket) tangent to the direction its already moving.

    Also, the bucket is absolutely experiencing the force of the water acting on it - right from the start of the string pulling taut, the water has been pushing on the bucket’s walls (and even before, actually, the whole time the water is in the bucket). But that’s not really relevant.

    I’m not quite sure I get how fictitious anti particles relate to fictitious forces.

    Sorry, I didn’t mean to muddy the water - I was just trying to illustrate why it’s called “fictitious”. It looks and acts like a force (or a particle, in the case of the marble), but it isn’t one because it doesn’t actually exist outside that frame of reference. Centripetal force is the “pull” towards the centre of the circle that is required for circular motion; if you think of the actual motion of swinging a bucket around on a string, you’ll be pulling on the string (if you don’t pull, the bucket flies off in a straight line, along with the water in it). And, if you don’t pull the string, and the bucket and water fly off in a straight line, then the water (and bucket) no longer experience the centrifugal force they got while tracing the circular path.



  • It’s called a fictitious force because there’s not actually a universal phenomenon like gravity or electromagnetism that causes it. When the bucket starts moving, the water is at rest, and the bucket’s motion causes the water to move in a single direction. When the bucket’s vector starts to change, the water’s vector does not. The water is still moving in the original direction, but that direction is now “outwards” from the centre, and the bucket exhibits new motion on the water, changing the direction it’s traveling again. The water is trying to escape the bucket, but keep going in the direction it’s already going (outwards), not towards the centre of the circle the bucket is tracing. The bucket however is in the way, redirecting it along the circular path. Remove the bucket, and the water goes flying off away from the center of the circle.

    Another way to understand a fictitious force is to think of a bunch of marbles in a box, packed tight so all the marbles are touching and none of them can move. Each marble is a particle, push on one and you affect others around it. Now, remove a marble so you have a space, and only one marble can move at a time. And now, reverse your vision - the space left by removing the marble is the particle, an “anti-particle”, and the marbles are free space. Push on the marbles, and the anti-particle moves around like a marble would. It’s not a marble of course, it’s a space, so you could call this “anti-particle” you just created “fictitious”.

    So it’s not that the water in the bucket is accelerating inwards, because it’s not the water maintaining that circular motion at all - it’s the bucket maintaining the circular motion. The water’s “inwards acceleration” that keeps it moving in a circle is actually just the water’s inertia, relative to the motion of the bucket.







  • This is how society corrects behavior

    Followed by

    Your office comparisons are insignificant here

    Really? School is where we learn how to treat other people, and we learn it by example as much as being told (more than, I’d contend).

    Claiming this will immediately lead to bullying or just the threat that it might do is to an extent quixotic to me

    First off, quote where I claimed it would immediately lead to bullying (good luck). Secondly, yes, whether believe it or not a teacher engaging in this behaviour signals to the other children that it’s okay, there’s an extremely elevated chance that they will take that and run with it.

    If a teacher telling a kid to get their feet off the table, to stop shooting spit wads at the row in front of them, to stop rocking back their chair because they might tip over and fall - if all these situations are okay for a teacher to say out loud in front of the class: “Kevin, stop it!” - and I think they are - then telling the kid not to chew on communally shared erasers is no different.

    Telling, yes. They’ve already told them to stop it. Your suggestion, however, was

    I would go for gentle peer pressure. Point it out in class, do a friendly dressing down how none of the other students want to use the chewed on eraser. If he won’t stop if you say so, maybe you can get other kids to do the trick. The unwanted public attention from his peers might be enough.

    “peer pressure”, “dressing-down”, “maybe you can get other kids to do the trick”. That last one in particular. How exactly do you think the other kids would do the trick? Harass the child into stopping, yeah? Or are you gonna come out now claiming that kids are masters of nuance and they’ll be able to get him to stop without resorting to bullying? Your initial suggestion was bad, but at this point you are being absolutely ridiculous. OP “weighed in against the suggestion” with the words

    Kids at that age are ruthless, I absolutely can’t do that

    And yet you still want to act like I’m in the wrong for saying that it would open the child up to bullying. An absolutely mind-blowingly dumb argument. I sure hope you’re not responsible for children with this kind of thinking; I had a few teachers like you and I hated them for it.



  • I read your checklist, and I think you missed the bit where I said “when it sounds like all other options have been exhausted”. There’s absolutely no need for the “peer pressure” component, it’s unnecessary to call out a kid on front of a class like that when you could just as easily have a private conversation with the kid about it, and I suggest you think about what it means to enable bullying without actively participating in it.

    I don’t think they will go full Lord of the Flies on him

    You have no way of accurately predicting this, because it’s children we’re talking about, and they are famously agents of chaos.

    I can’t think of a single office I’ve worked where it would be considered professional to call someone out for minorly problematic behaviour in front of all their colleagues, and I don’t see any reason it would be considered acceptable with children either.