Magnets

[the_lone_wolf]

Should probably start by saying I'm a Physics graduate so feel free to talk techincally to me!!

Recently bought a bunch of tools from Halfords and their "Industrial" tool cabinets

Bought myself a magnetic tray, and instead of having it take up drawer space it's being stored stuck to the side of the cabinet

Now...

Something bothers me...

My mind wonders where the energy to hold the tray up is coming from? Are the magnets losing their power at an increased rate than they would if the tray was stored on a shelf?

Or am I making a mistake assuming that holding the tray against gravity's pull requires an energy cost...

[the_lone_wolf]

otolith said:

the_lone_wolf said:

Or am I making a mistake assuming that holding the tray against gravity's pull requires an energy cost...

Yes.

Nothing's moving and nothing's getting hot!

Sounds about right...

Thought that would have to be it...

[the_lone_wolf]

hairykrishna said:

the_lone_wolf said:

Should probably start by saying I'm a Physics graduate so feel free to talk techincally to me!!

A physics graduate? From where? No work is being done. No 'energy cost'.

Hence my above post about me thinking the same thing...

But your reply is greatly appreciated...