The last description makes the most sense, as to how the wording "mob" and "populace" imply them as behaving as group. Called social group psychology, many people "join the crowd" when it comes to supporting or opposing certain events, causes, or acts.
Gravitational firce and speed,light i guess. LOL im not even sure is this is right
Answer:
a physical action is movment.
a mental action would be thinking something.
Explanation:
example of physical action: picking up a box and moving it.
example of mental action: thinking of a better way to move the box