1. Not finding help here? Sign up for a free 30min 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!

Balloon force forumla

  1. Jul 8, 2004 #1
    A 30kg balloon is filled with 100m^3 of hydrogen. How much force is needed to hold it down??


    I'm not even sure which formula to use with this one. :confused:
     
  2. jcsd
  3. Jul 8, 2004 #2

    arildno

    User Avatar
    Science Advisor
    Homework Helper
    Gold Member
    Dearly Missed

    What is the total weight of the system balloon+hydrogen?
    What is the buoyancy force of air associated with 100m^3 volume?
     
  4. Jul 8, 2004 #3
    got it, thanks...


    i guess the biggest problem was that the answer was given in newtons and i had it in kgs.

    newtons alway smess me up :P

    thanks for your help!
     
  5. Jul 8, 2004 #4

    arildno

    User Avatar
    Science Advisor
    Homework Helper
    Gold Member
    Dearly Missed

    NB!
    Force is measured in newtons, mass is measured in kgs (in the IS system, that is).

    This is completely different concepts, and mixing up units on exams, for example, is a VERY BAD THING (at least in Norway..)
     
  6. Jul 8, 2004 #5
    it is the same here in the states...
    :biggrin:
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?



Similar Discussions: Balloon force forumla
Loading...