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!

Buoyant Force question

  1. Mar 27, 2007 #1
    1. The problem statement, all variables and given/known data

    A 0.5 kg block of wood is floating in water. What is the magnitude of the buoyant force acting on the block.

    2. Relevant equations

    :confused: :confused: :confused:

    B=Buoyant force: W=weight; fl=fluid; m=mass; V=volume; DEN=density;

    There are a couple of equations that our professor gave us, but I am totally confused how to use them.

    B=Wfl & Wfl=Wm & Vm>Vfl & DENflVfl=DENmVm

    3. The attempt at a solution

    I have figured weight of the mass--W=mg, which is 4.9N

    Looking at the first two equations, I would lean toward the thought that 4.9N is the answer, but that seems too easy. Am I making this more complicated than it needs to be, or I am truly as confused as I feel?
  2. jcsd
  3. Mar 27, 2007 #2


    User Avatar
    Science Advisor
    Homework Helper

    Sometimes questions are easy. You are correct - after all the block is floating.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Similar Threads - Buoyant Force question Date
Buoyant Force Question Apr 16, 2017
Question on buoyant force Mar 28, 2016
Buoyant force concept question Jul 28, 2010
Buoyant force question Dec 7, 2009
Buoyant Force Conceptual Question Jun 1, 2008