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Homework Help: Find Max mass(not weight) supported by an air matress in fresh water.

  1. Sep 29, 2010 #1
    1. An air mattress is 2.4 m long, 0.65 m wide, and 12 cm deep.

    2. If the air mattress itself has a mass of 0.21 kg, what is the maximum mass it can support in freshwater?

    3. I have absolutely no clue in which direction to go in once i found the buoyant force, which im not sure is right either.

    Please Help :confused:
    Last edited: Sep 29, 2010
  2. jcsd
  3. Sep 29, 2010 #2


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    Staff: Mentor

    What is the volume of the mattress? What would an equivalent volume of water weigh?

    Given that number, and the weight of the mattress, what can you say about what bouyant force the mattress can generate when fully submerged in water?
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