# Do magnets attract magnetic objects of different mass with equal force?

## Main Question or Discussion Point

Hi,

Doesn't a magnet attract objects of different mass(consider Point mass), but placed at the same distance from it and of the same magnetic substance, with different forces, similar as is the case with gravitational force with Force=G*mass1*mass2/distance between them^2 ?
For example if an "a" mg iron filing is placed "x" cm from a magnet, will the magnet produce the same or a different force on it as it would on a filing with "b" mg, also placed "x" cm from the magnet?
If different what is the formula for magnetic forces between varying masses?
Thanks.

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Permanent magnets you mean? Yeah you can sort of think of a "magnet" as a collection of smaller magnetic dipoles and then superpose them, except you must consider that neighboring magnets influence each dipole. But neglecting this will give you a crude approximation.

Meir Achuz