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I need help understanding PSI and FORCE

  1. Sep 10, 2012 #1
    Does a 12" x 1.5"D tube filled with 10psi have more force on an piston than a 6" x 1.5"D tube filled with 10psi?

    Or is 10psi the same on an object no matter what size the tank...
  2. jcsd
  3. Sep 10, 2012 #2
    What is the area this pressure is acting on? Is it the same or different between the two cases?
  4. Sep 10, 2012 #3
    The area of the piston would be the same.
  5. Sep 10, 2012 #4


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    Lets say you have a conventional bicycle tyre pump (eg piston in a tube). The force you need to apply to the pump handle depends on the pressure in the tyre and area of the piston and NOT the volume of the tyre.
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