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!

Floatation in water?

  1. May 4, 2007 #1
    hi, I am after some help from a person with a understanding of water displacement principles.
    On a small scale- if an empty 5 LTR bucket is floated on a body of water, it will float, if the bucket is filled with water it sinks.
    But if the empty bucket is place upside down, thus trapping a 5Ltr volume of air, the weight required to sink the bucket is more than the weight of the 5 Ltrs of water, is this true, and is there a formula for working out the volume of Air trapped and what weight is required to sink it?
  2. jcsd
  3. May 4, 2007 #2
    No, the force is equal to the weight of 5 litters of water.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook