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Force of a nail inside an MRI machine

  1. Mar 29, 2013 #1
    I just want to gain a ballpark estimate for how much force an MRI machine can generate on a small object such as a nail.. lets say the magnet is 1-2 Tesla. Very rough estimates are ok.
     
  2. jcsd
  3. Mar 29, 2013 #2

    mfb

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    Staff: Mentor

    It depends on the volume of the nail. Of the order of 3N/cm^3 (for iron/steel nails).
    In terms of acceleration, the volume cancels, and we get something like 45g, where g is the gravitational acceleration on earth.
    It is important to have an inhomogeneous field - I assumed a typical length scale of 1m here.
     
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