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Kinetic Energy With Only Area, Density and Speed

  1. Sep 2, 2011 #1
    I have the following elements:

    Speed: cm y-1
    Area: km2
    Density: kg m-3

    What do I have to do?

  2. jcsd
  3. Sep 2, 2011 #2
    Kinetic energy is KE = 1/2 mv2. You already have the speed v, you just need the mass. Mass can be defined as density times volume, or density time area times. It looks like you are missing the length of the objects, which will be needed to find the mass.
  4. Sep 2, 2011 #3
    I don't have the length specified.
    It's in relation to a tectonic plate.
    I don't know how I am supposed to work it out.
    The only other information I have is the direction which does not determine anything.
    It only has to be a rough estimation but still don't know how I will work it out based on the figures I have.
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