  Education, science, in fact the whole society, extensively use images.
Between us and the world are the visual displays. Screens, small and large,
individual or not, are everywhere. Images are increasingly the 2D substrate of
our virtual interaction with reality. However images will never support a
complete representation of the reality. Three-dimensional representations will
not change that. Images are primarily a spatial representation of our world
dedicated to our sight. Key aspects such as energy and the associated forces
are not spatially materialized. In classical physics, interaction description
is based on Newton equations with trajectory and force as the dual central
concepts. Images can in real time show all aspects of trajectories but not the
associated dynamical aspects described by forces and energies. Contrary to the
real world, the world of images opposes no constrain, nor resistance to our
actions. Only the physical quantities, that do not contain mass in their
dimension can be satisfactory represented by images. Often symbols such as
arrows are introduced to visualize the force vectors.
