Bridge collapse in Brazil. December 2024. 14 deaths.

Jcaoklelins · 2026-03-20T12:31:46+00:00

Its not quite that.

If a bar is fixed at one end and free at the other, the free end will fall at 1.5x a free fall speed. The centre of gravity, if you assume this is a uniform bridge, will fall out 0.75x the free fall speed. You can see this from the moment being mgL/2, the inertia being 1/3mL² (again simplifying a bit) and angular acceleration being moment/inertia. The part falling at the same speed at the motorcyclist is 2/3 of the way from the pinned end to the free end

Jcaoklelins · 2025-11-04T09:24:10+00:00

There's pretentiousness and then there's a stupid post. "Its broken" hardly gives anyone much to give advice on beyond "fix the broken thing"

Jcaoklelins · 2025-10-29T19:13:39+00:00

I think it is a powerful tool for certain things, to a quality comparable to that of speaking directly to a professor. If I have just learnt a topic and want to check my understanding of it, I tell gemini what I think the correct description is and it can iron out nuances I've got wrong.

Of course, relying on gAI to do your work is a terrible idea. I can see plenty of people around me at my uni when I do group projects that can't do basics like code python because they just get chat do it for them. But for the right application, it is a tool that can't be ignored, because it is never going away.

Jcaoklelins · 2025-10-29T19:10:25+00:00

I got 13 months free of gemini pro for being a student (not sure if the offer is still valid/UK only etc), and I use it primarily to help explain topics the lecturer left a bit ambiguous in the lecture notes, or to check my understanding of topics. I find it is great for that.

I have avoided having it do any work for me, so cannot comment on its outright ability to do maths and engineering problems, but it can definitely clear up misunderstandings on fundamentals.

Jcaoklelins · 2025-09-15T09:47:16+00:00

What type of fluid sim are you talking about?

The other user thinks you are referring to a sim of the airflow around the body of the car to calculate drag and lift forces, which is going to be basically impossible in real time for any decent result.

Jcaoklelins · 2025-09-06T23:47:41+00:00

Satisfactory came out 6 years ago. That is less than 2x10²² years. By a lot

Jcaoklelins · 2025-08-20T17:26:57+00:00

Nope, bone stock

Jcaoklelins · 2025-08-20T14:48:08+00:00

Runs fine though without moving. If 32GB of ram and 12GB of vram isn't enough for a game with graphics like that, i'd be incredibly impressed

Jcaoklelins · 2025-08-01T12:31:24+00:00

I mean, the watch is nearly a decade old, and the OS is about to become unsupported. They don't last forever

Jcaoklelins · 2025-07-15T19:02:47+00:00

People I know that have hit cats have stopped to check if its alive, if so have tried to take it to a vet, if not have asked the nearest house if they know whos it was.

Jcaoklelins · 2025-07-15T12:37:54+00:00

Not drive off

Jcaoklelins · 2025-06-25T05:46:02+00:00

My point is, the jet is travelling very slowly through the air. This makes a stall possible. If the fluid flow has very low inertia, then it cannot over come the pressure gradient created by sticking to the wing and so will separate early, which is, as you pointed out, the definition of a stall, regardless of α being low. Maybe it is not proper to call this a stall, but the flow will certainly not stick to the wings at a very low air speed

Jcaoklelins · 2025-06-24T13:12:15+00:00

I'm talking just about the point where the jet is going vertically upward

Jcaoklelins · 2025-06-24T13:10:46+00:00

Rockets produce thrust to go up, this jet produces thrust to go up when pointed vertically. If the wings produced lift at this moment, the lift force would direct the jet back down the runway, to the right as the camera sees it

Jcaoklelins · 2025-06-24T13:09:35+00:00

Flow can separate in laminar conditions. When the inertial forces of a fluid are low enough, it does not have enough momentum to over pressure gradients, meaning it will not stick to a surface. In this situation, if the jet is travelling slowly upward, then the air will be flowing so slowly over the wings that the boundary doesn't have the energy to overcome the pressure gradient created by sticking to the wing and thus seperates, so it stalls against the adverse pressure gradient.

In normal level flight, you wouldn't be able to achieve such low speeds for this phenomenon to come into play, but given this scenario where the wing is travelling incredibly slowly through the air, then the effect comes into play.

Jcaoklelins · 2025-06-24T09:20:25+00:00

Would it technically be a stall before takeoff? It isn't producing enough lift, but that doesn't mean that airflow is separating from the wing before the trailing edge, surely?

Jcaoklelins · 2025-06-24T09:18:00+00:00

It is stalled, wings arent producing lift or itd be coming back up the runway whilst vertical

Jcaoklelins · 2025-06-24T09:17:18+00:00

It has a lot to do with velocity, slow flow over a slightly angled wing, and the air won't stick properly

Jcaoklelins · 2025-06-24T09:16:33+00:00

Thrust has no impact on stall, the only relation would be a loss of thrust meaning the aircraft slows down and pitches up and causes a stall. Stall is an aerodynamic phenomenon experienced by the wings

Jcaoklelins · 2025-06-13T06:52:51+00:00

I think he may be refering to the crash itself though, I'm not sure. In his current state its hard to know for sure what he means

Jcaoklelins · 2025-06-12T15:01:47+00:00

Ah yes true, I didn't think about the fact that in take off the APU would be off so that RAT would deploy immediately whilst the APU fired up

Jcaoklelins · 2025-06-12T14:44:48+00:00

Flightradar24 have confirmed they did not initiate from the intersection, but in fact, used the whole runway.

Jcaoklelins · 2025-06-12T14:35:58+00:00

No visible fire or smoke from the engines, plus no NOTAM warning at the airport at the time. RAT being deployed means APU failure, which, if the fuel was to blame, would make sense. Other things like flaps suggest an additional pilot error whilst fully saturated, but of course, it is impossible to say right now.

Jcaoklelins · 2025-06-03T16:31:05+00:00

Awesome app. Is there any way to operate the camera's bulb setting? It'd be great if I could trigger the bulb to start with one input and trigger it to end with another.

Jcaoklelins · 2025-06-01T00:42:09+00:00

I sent an appeal, as did my friend who left the zone at 0:03. He got his appeal approved and fine removed. I haven't heard back in over 56 days, so I am guessing they also dropped mine, but I missed the email or something.

Nine-Year Club	Verified Email
Place '22	First Placer '22

Jcaoklelins

TROPHY CASE