Recent content by some bloke

I was meaning that my experience with servo motors tends towards them driving to an absolute position and then doing their darndest to not let that move! Chances are this is more to do with how they are used in my workplace rather than their full capabilities. So if I have a ball-screw run off...

I'm afraid I don't know the exact values just yet, but my experience with DC servo motors was that they were fairly absolute. Would it damage one if the load on the servo was pushing it back against the direction it was pushing? Load will probably be around 50-300kg (variable during operation)...

Without going into too much detail, I have a project which I am considering my options for, and one design would have potential if I can find some sort of force-based linear actuator. I suspect that there might be some sort of magnetic-based system out there which operates on a changing...

The symmetrical die produces curved pasta bacause the dough being pushed out at the edges of the barrel is moving slower than the dough in the centre. The dough is pushed out via the middle, which drages the next "ring" of dough, which drags the next, all the way to the outside edge where the...

Relativistic motion and time dilation has been of interest to me for a long time, and whilst I am asking this for realism in writing a piece of fiction, I am curious as to how this interaction would work. Let's say there's a large dyson ring built around earth, which is spun up such that the...

Ididn't get it at first, then I started breaking it down. I often find breaking the movements down, sort of like addition of vectors, works for my mind!

Thank you all so much, I feel confident that I've got this one right, though I will still be checking with my tutor tomorrow as I'm certain this was not covered in our lessons, and I want to make sure that I'm not expected to demonstrate a different method!

Ok, I agree on the height at S=0.022 as 0.0003m. From that I worked out that a constant equal to the total energy multiplied by mass was equal to 1/2v^2 plus gh, which gave a value of 0.983*m. Then to get maximum height (where Ek is 0) I have mgh=0.983m, thus gh=0.983, so h=0.983/9.81, which...

Doing a quick adjustment (I am using excel to work it all out so changing variables is easy) I suspect he changed it from 0.4m/s to 1.4m/s. 0.4 comes out with an amplitude of about 100mm, which is much more like a simple pendulum! On getting significantly more on amplitude, my first...

The problem frames it that the pendulum is displaced horizontally by 0.022m when the bob is moving at 1.4ms-1. It then gives you the length of 0.8m and asks for the Amplitude and Period. Period is 2*pi*root(length/gravitational constant, so that's simple enough to calculate. Amplitude I have...

It's the maximum displacement of the pendulum from the equilibrium point?

That might be as I'm using g=9.81ms-2, so that might be where the slight difference is?

Thanks all! I used the energy side to work it out, I ended up with an Amplitude of 0.388m and a Time period of 1.79s - it all seems reasonable, does this look correct?

[Mentors' note: moved here from the technical forums after the thread was already fully developed, so no HW template] Hello all! I have a problem which I am beginning to suspect I am either unequipped to solve, or which does not have enough details! I can see, in my mind, the problem, but I...

Hello everyone! I am brainstorming a project which will require an adjustably damped shaft connector, which is a term I'm making up and I think it's about right. The shaft will be driven at one end, with an intermittent drive. There will be a shaft dampener after this, which will cushion...