I am a bit confused. When two objects are in a free fall such that when released to free fall they were one top of another, will there be any contact force between the two objects and will there be a change in intermolecular distance to when they we at rest , also one top of another. Ignore air drag. Will they remain together or what?
Is there a contact force between two bodies one top of another like a book on table perfectly smooth free falling and if the contact force disappears that what happen please explain in detail.
Also why are objects pushed up as soon as they start free fall why cant they remain where they are.