How does mechanical motion start at the deepest, smallest level?

[256bits]

It comes from me

For non-rigid bodies, waves are how the rest of the body learns that something happened at a location

Sorry for what appears to be an 'flaming' post.
Transient response of system is a broad field on its own, with either discrete lumped elements or with a continuum medium.

 

[syfry]

The great R P Feynman gave this some thought. The first part of this interview is wonderful, in my opinion.
Please give it your attention.

Great video! A physicist who realizes the value of imagination and visualizing the currently unviewable parts of physics.

Thinking something people would really enjoy is a 'Feynman forums' where physics people can team up with visual artists to 'explain like they're Feynman'.

Visuals for the travel of energy from the net motions of electrons into fields could've been such a benefit to his explanation, and the types of visuals today are really advanced and so much more available to everyday people.

Sorry for what appears to be an 'flaming' post.
Transient response of system is a broad field on its own, with either discrete lumped elements or with a continuum medium.

Seems totally reasonable, not flaming at all.