Actor and the component

This is bugging me for a while.

suppose you have two static mesh components inside an actor if you apply force or impulse to one of the static mesh component it would move , but how will it affect the location of the actor since the other component is not moving.
What if the moving component is root component and what if it’s not the root component?

again what is the volume of the actor in world space? Is it all of its components seperatly?