FranzS's latest activity

Yes, sorry, I replied too much in a hurry during lunch break. :smile: I'll think about your last post thank you

The sketch you've drawn would probably not work like the system I described. The real situation is:

A mechanism acts to compress the rod/piston. During compression, the pressure inside the two chambers (whose volumes change, i.e. volume...

Ok then, as I said it doesn't matter, but since you are committed to the problem I'll disclose its exact formulation: $$ \begin{align} &...

Thanks for your interest. However, I have no freedom on any parameter, they are all predetermined. I see no use in explaining all the...

It's not a choice, the constants are dictated by the real problem being analysed. Anyway, I found out that the quadratic power series...

Sorry, it's my fault. I didn't specify that for ##t=0## the constants combine such that ##x(t=0)=0##.

Thanks again, but this is exactly my original problem: ##g'(f,t)## diverges for##t=0##.

Thanks a lot, but I'm actually interested in a closed form (approximate) solution.

As you may imagine, this differential equation describes the evolution in time of a certain quantity ##f(t)##, and only the initial...

RHS of (1) would be g which is made of f and t.

Oh well, it's pretty intricated. I'll write it by steps: $$ \begin{align} & f'(t)= - f(t) \cdot \ \frac{V_1'(t) + c_0 F(t)}{V_1(t)}...

Hi PF, I'm trying to find an approximate solution of a differential equation that can't be solved in exact form. The differential...

Yes, this is what I thought. Just compare the effects of static forces with dynamic impacts

I wasn't sure where to put this one, but I put it here... (I thought about posting in the Favorite Songs thread, but this is a sketch...