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Force of a nail inside an MRI machine

by anorred
Tags: force, magnet, mri, tesla
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anorred
#1
Mar29-13, 02:48 AM
P: 56
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.
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mfb
#2
Mar29-13, 07:50 AM
Mentor
P: 11,925
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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