Fluid & Forces Homework: F2 = (A2/A1) F1

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The discussion revolves around understanding the relationship between force and area in fluid systems, specifically using the equation F2 = (A2/A1) F1. A participant expresses confusion about why system 3 requires the same force as system 1, emphasizing the need for a conceptual explanation rather than a mathematical one. There is a request for clarification on which specific question from a slideshow is being addressed, indicating multiple queries are present. Another participant mentions needing to add up velocities for their solution, highlighting the complexity of the problem. The conversation underscores the importance of grasping the underlying concepts in fluid mechanics.
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Hi,

I believe this is a question that requires a simple explanation without having to do any mathematics.

If people are disregarding this post, simply because it seems as if I am just thrusting the question out there, I am not.
The question is simple. It's a conceptual question.

So please take your time to answer.
 
which one? I got a slide show with several queations?
 
denverdoc said:
which one? I got a slide show with several queations?

the 3rd question please

thanx
 
1 just have to add up the velocities, first time i went thru it I was wrong.
 
Thread 'Variable mass system : water sprayed into a moving container'

Thread 'Variable mass system : water sprayed into a moving container'

Starting with the mass considerations #m(t)# is mass of water #M_{c}# mass of container and #M(t)# mass of total system $$M(t) = M_{C} + m(t)$$ $$\Rightarrow \frac{dM(t)}{dt} = \frac{dm(t)}{dt}$$ $$P_i = Mv + u \, dm$$ $$P_f = (M + dm)(v + dv)$$ $$\Delta P = M \, dv + (v - u) \, dm$$ $$F = \frac{dP}{dt} = M \frac{dv}{dt} + (v - u) \frac{dm}{dt}$$ $$F = u \frac{dm}{dt} = \rho A u^2$$ from conservation of momentum , the cannon recoils with the same force which it applies. $$\quad \frac{dm}{dt}...
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