Recent content by AronYstad

So if we disregard friction, the more angular momentum it has, the slower it topples over?

I still don't understand. Take the example in my original post where the wheel spins extremely slowly, say 1 revolution per year, without friction. That's very similar to if it was not spinning at all, in which case it would just topple over. Wouldn't it still just topple over even without...

Yeah, I know that that is the case. I know that it does precess. My question was about why it still eventually topples over and doesn't keep precessing in circles forever, and how this relates to the speed of the rotation. I would also gladly accept an explanation of this behaviour using torque...

I tried to understand why gyroscopes fall over more slowly the faster they spin, but I couldn't wrap my head around it. So I tried looking for threads about it, but I only found people saying friction is the reason why the gyroscope topples over. And I guess that might be the main reason if it's...

No, I have "Formler & tabeller i fysik, matematik & kemi för gymnasieskolan" by Ekholm, Fraenkel and Hörbeck.

Yeah, I know that, and that's why I'm confused by the formulation in the formula book. It makes it seem like a time interval can be measured with only one event.

Also, in my physics formula book, there is a note next to the formula for time dilation, which I find to be quite contradictory to the answers I have gotten in the two threads I have made here. Here is my best translation of the notes: t is a time interval measured by a clock that's moving with...

Sorry, English isn't my main language, so I don't really understand what you mean by "reconcile". However, are you saying that my calculations were correct, but to understand how they can be correct while keeping symmetry, you need to take into account that Bob sees Alice checking/stopping her...

Thanks for the explanation. My original statement wasn't about that type of question though. I said that for questions where it wasn't about distance, it would be about an observer looking at their own clock and the other clock and comparing them, for example in questions where you're only...

I got the right answer when I simply accounted for length contraction, and now you've confused me. Do I need to take all of that into account, or can I simply think of it as Bob measuring a shorter distance because of length contraction, and therefore a shorter time since both measure him to be...

Is that true even when the problem says that the clock on the spaceship falls behind? Cause both observers will see the other observer's clock slowed down, right? So if the question says that the spaceship's clock falls behind, then doesn't that mean that that's what's observed from Earth?

I was a bit unclear with the wording. What I meant was that the question would be about for example looking at your own clock, then looking at the clock on a spaceship and comparing them. I know that each observer only sees the event in its own reference frame. Also, as stated, I don't know the...

So it depends on what the question is asking for. If it's about time and velocity, but not about travelling a certain distance, then the question is almost always about what an observer sees in its own reference frame compared to what it sees in the other reference frame, and that's only time...

Thanks. That makes intuitive sense to me. However, when I asked about another question back in March about someone going from Earth to a dwarf planet in a spaceship, the answer I got was that the person in the spaceship measured the shorter time T0, or what you just called t. This made me...

Except for the Lorentz factor, I haven't seen those equations before. I have only ever seen the Lorentz factor used in the formula for time dilation that I put in the beginning of the thread, and the similar formula for length contraction. If I haven't been taught the Lorentz equations, then it...