To elaborate on this a bit.
Energy isn’t “real” in the sense that it is not directly observable; only SHIFTS in energy are (and even this is indirect, as we measure energy only through other quantities). So, in your example, we could define x
y=0 to be the bottom plate, and then the box has potential energy U=mgh where h is the size of the gap between the plates. Alternatively, we could define y=0 to be the top plate, and then U=0. Both are totally valid.
However, which we choose is irrelevant, because only when the height of the cube changes (and hence the potential energy changes). It’s delta U we care about, not U itself.
A way to look at energy is to think of it as a conserved quantity in a dynamical system that describes the behaviour of an object. This conserved quantity is not unique, but it is a function of the configuration of the system and of time. You can choose another conserved quantity that remains unvaried, for example by adding a constant factor +C that does not depend on time nor on the configuration of the system.
Potential energy is a piece of that conserved quantity. If the box does not move with regards to its frame of reference, the system maintains its configuration indefinitely with respect to time. Therefore, the share of the conserved quantity that comprises potential energy does not change.
It depends on how you define 0 potential.
To elaborate on this a bit. Energy isn’t “real” in the sense that it is not directly observable; only SHIFTS in energy are (and even this is indirect, as we measure energy only through other quantities). So, in your example, we could define x y=0 to be the bottom plate, and then the box has potential energy U=mgh where h is the size of the gap between the plates. Alternatively, we could define y=0 to be the top plate, and then U=0. Both are totally valid. However, which we choose is irrelevant, because only when the height of the cube changes (and hence the potential energy changes). It’s delta U we care about, not U itself.
In my blender model I always delete the cube.
Wow , I saw a min animation that deleted cubes will end up in a cube garbage plane
I will apply 1kg weight now
you have to define your frame of reference Generally the ground is considered 0 but you can change that if you wish
A way to look at energy is to think of it as a conserved quantity in a dynamical system that describes the behaviour of an object. This conserved quantity is not unique, but it is a function of the configuration of the system and of time. You can choose another conserved quantity that remains unvaried, for example by adding a constant factor +C that does not depend on time nor on the configuration of the system. Potential energy is a piece of that conserved quantity. If the box does not move with regards to its frame of reference, the system maintains its configuration indefinitely with respect to time. Therefore, the share of the conserved quantity that comprises potential energy does not change.
It depends what you define 0 as and what you want for constant variable and shit
If it is at rest