Recent content by Phyba

Homework Statement I have to answer a few questions about a lab session I did (university) and I'm really stuck with this one. The objective of the lab session was to find the self inductance (L) of a solenoid. In order to do that, I had a function generator exciting a solenoid with a high...

If in a non-quasistatic process the pressure is constant, is the work necessarily equal to cero? I have from the notes taken in class that it must be 0, but I don't really see why, so I'm not sure whether maybe I didn't hear it well. I haven't really started to work with non-quasistatic...

Well, actually it could never be a short circuit beacuse the voltimeter has a very high resistance, right? So there is a current and the voltimeter would read 0? :confused::confused:

My doubt is about the circuit in the picture. The capacitor is charged ans the switch open. There's a voltimeter connected to the terminals of the capacitor. Does a current flow through the wires of the voltimeter causing a short circuit? If not, what would happen in the circuit described...

Solved I'm uploading the solution (although it's a simple problem), in case somebody that got stuck with something similar finds it useful in the future. :) This forum is awesome

Thank you very much, you two! I got confused because of how I tried to solve it at first. I did it and obtained μ=0.34, which makes a lot of sense. Your help was very useful!

Thanks Shyan, I have a doubt: what I'm trying to apply is that the work of non.conservative forces is the variation of kinetic energy. So, why should I add gravitation to my equation if gravitation is a conservative and is not responsible of the variation of KE?

Thanks, Nasu. So I now write the work-energy theorem for the up and the down motion separately: up motion: down motion: But I can't solve for any of the unknown variables s and μ with these two equations.. What am I doing wrong?

A 20 Kg. mass slides up on an infinitely long inclined plane (that forms an angle of 30º with the horizontal) with a velocity of 12 m/s. It's known that the mass returns to the starting point with a velocity of 6 m/s. Find,μ, the coefficient of friction between the plane and the body. This is...