1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Pressure energy

  1. May 29, 2014 #1
    1. The problem statement, all variables and given/known data
    Consider a tube of uniform cross section, let one end (a) of the tube is at height h1 and other end (b) is at height h2, where h2>h. Now an incompressible fluid passing through the tube the workdone to pass the liquid at end (a) P1V1 and workdone to pass the liquid at end (b) is -P2V2. So the net workdone is P1V1-P2V2= pressure energy, am I right? The negative sign indicate that at point (b) resists the motion of fluid at (b) How? What is the reason it resists the motion of fluid at (b)?
  2. jcsd
  3. May 29, 2014 #2
    You might have to consider doing work against gravity.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted