Norfleet said:Sharpness isn't really a property of the wall of force itself, but is simply how thin the edge of an object is: A wall of force is a 2-dimensional object, and as such, having no width, possesses infinite sharpness.
This is incorrect. Infinite sharpness would imply that the width of a wall of force is infinetly small, thus it places an infinite pressure on anything placed against it (pressure = force/area). The width is not infinetely small, it is nonexistant.
It's immovable. It's impenetrable, which means it's infinitely strong, because if it were not infinitely strong, then a finite force would be able to penetrate it, thereby meaning it's not impenetrable. It's infinitely hard, because it's completely immovable in all parts, and therefore perfectly rigid and cannot be bent, scratched, or chipped by anything. It's an immovable, impenetrable plane. Impenetrable planes, of course, happen to be the exact description of a perfect razor.
Again, these things do not mean that the wall is infinetly strong. If it were, in fact, infinetly strong, it would mean that the Disintegrate spell would have to provide a greater than infinite energy to destroy it. The physical implications of that are just ridiculus.
You can't use physics to explain a wall of force, because a wall of force does not exist. It is not made of matter or energy, it has no gravity, and no potentials associated with it. It's magic. Read the spell description, use the spell only as written, and live with it.