Force of a nail inside an MRI machine

by anorred
Tags: force, magnet, mri, tesla
anorred is offline
Mar29-13, 02:48 AM
P: 50
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.
Phys.Org News Partner Physics news on
Better thermal-imaging lens from waste sulfur
Scientists observe quantum superconductor-metal transition and superconducting glass
New technique detects microscopic diabetes-related eye damage
mfb is offline
Mar29-13, 07:50 AM
P: 10,786
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.

Register to reply

Related Discussions
Pedagogical machine acceleration when force is 0 Introductory Physics Homework 11
(Statics)Hammer and nail force and tension Introductory Physics Homework 1
shearing stress/force in nail Engineering, Comp Sci, & Technology Homework 8
A nail is placed inside an electromagnet, why do we feel a buzzing sensation? Introductory Physics Homework 9
Force of nail after being struck by a hammer Introductory Physics Homework 3