erobz's latest activity

It's not difficult, but I do recall "getting it"(I learned algebra mostly as an adult though). I teach my kids by balance scale type...

The vertical pipe is the discharge. If there is a check valve at its base, we don't have to worry about dynamics of the flow into that...

If there is doubt, couldn't we just compare the cited pump head of manufactured ram pumps to the theoretical ## \frac{\Delta p}{\rho g }...

I know the feeling very well. :smile:

Okay, I stand corrected. Had been thinking about it and realised that, yes, there needs to be a moment of negative pressure for the...

The water stops flowing because someone slammed the gate closed. The pressure spike ( post sound wave beginning to travel toward the...

Dimensionally it's inconsistent. So back to the drawing board. I guess its dimensionally ok. On second thought it appears to be the...

No, I don't think so. Inertia (mass) could be considered resistance to acceleration due to applied force via a=f/m. I'm not even sure...

Inertia is how hard it is to make something change its state of motion, which is essentially mass.

Assuming negligible contact duration is pretty standard in such collision problems, and often the only way to get a solution, without...

Ok, basically like a glass marble impacting a steel rod and the duration of impact tends to zero. (I.e normal force doesn’t have time to...

No, as I posted, you just need to assume the objects are arbitrarily rigid. That does not conflict with assuming the collision to be...

I would assume that if they are of comparable mass then the solution one gets from simplified analysis is horsecrap (far from...

I wouldn't have asked if it was "clear".

Should maybe the author just restrict the domain of the analysis to rods significantly more massive than the ball so the angle of...