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Homework Help: Struggling with post-lab question

  1. Jul 23, 2007 #1
    5. A block of wood floats in a beaker of water. According to Archimedes’ principle, the block experiences an upward buoyant force. If the beaker with the water and floating block were weighed, would the measured weight be less than the sum of the weights of the individual components? Explain.

    2. Relevant equations
    fb = change in pressure * A

    3. The attempt at a solution
    I am utterly lost
  2. jcsd
  3. Jul 23, 2007 #2


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    If block has mass m1 and beaker and water together have mass m2, what are the weights?

    Now put block in the water. What happens to the masses? The what is the weight of the masses?
  4. Jul 23, 2007 #3


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    Don't laugh but my city council announced a proposal to strengthen a canal aquaduct so it could carry heavier barges!
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