What if you hold the magnet that holds something? ;d
I think we should talk force/work/energy/material structure.
Force is just force, how hard you push something.
Work is force times distance you moved that thing - moving something 10 meters is twice as much work as moving it 5 meters.
Energy is the abstract term that is basically Work, but normalized so we can define energy of any action (not only pushing something but like heating this, or spinning that).
Power is energy output per second. (not relevant here)
Person holding 1kg first uses energy to pick this up, then unfortunatelly because we're squishy uses energy to stabilise muscles (chemical energy) holding it against gravity.
Magned uses electric field energy (either static or dynamic cos there's two types of magnets) to pick up something - but once grabs it, it's no longer using energy (there's no movement) - things get 'frozen in time' and that thing magnet is holding just becomes part of the magnet. If you separate them - the thing "gives back" the energy to the magnet (you supply the energy by using force to separate them).
Now the thing that hold the magnet holds both - as long as it's not squishy human but for example the metal bar - it does not use energy to hold stuff (thanks to internal metal structure that's stiff enough to not move under magnet's weight, of course there's a border value of weight a metal bar can withstand without collapsing)
Think of a lamp post holding a lamp above a road - the post does the holding for 0 energy but someone had to use the energy to install the bulb up there. Person holding the same lamp would use energy because we're not stiff as metal.
I think we should talk force/work/energy/material structure.
Force is just force, how hard you push something. Work is force times distance you moved that thing - moving something 10 meters is twice as much work as moving it 5 meters. Energy is the abstract term that is basically Work, but normalized so we can define energy of any action (not only pushing something but like heating this, or spinning that). Power is energy output per second. (not relevant here)
Person holding 1kg first uses energy to pick this up, then unfortunatelly because we're squishy uses energy to stabilise muscles (chemical energy) holding it against gravity.
Magned uses electric field energy (either static or dynamic cos there's two types of magnets) to pick up something - but once grabs it, it's no longer using energy (there's no movement) - things get 'frozen in time' and that thing magnet is holding just becomes part of the magnet. If you separate them - the thing "gives back" the energy to the magnet (you supply the energy by using force to separate them).
Now the thing that hold the magnet holds both - as long as it's not squishy human but for example the metal bar - it does not use energy to hold stuff (thanks to internal metal structure that's stiff enough to not move under magnet's weight, of course there's a border value of weight a metal bar can withstand without collapsing)
Think of a lamp post holding a lamp above a road - the post does the holding for 0 energy but someone had to use the energy to install the bulb up there. Person holding the same lamp would use energy because we're not stiff as metal.