The Inertia...

Inertia -
Inertia is the resistance of any physical object to a change in its state of motion or rest.It is proportional to an object's mass.
The principle of inertia is one of the fundamental principles of classical physics which are used to describe the motion of matter and how it is affected by applied forces.

It seems even human psychology is also based on the physics rules!
How? Ok.. what according to you is life ?
Right now I dont know what it really means to you, as everyone has their own philosophical definition of life.
For me, It is just a mind game!
What mind game ?
Ok... I meant, the life is nothing but the kind of thoughts they usually process in their mind consciously and subconsciously ! All kind of thoughts have their own cause and effects. And we live in between these two points... Cause Effect !
Usually the strong circumstances in life defines how one is going to think from there after. specially when these "strong" circumstances happens in one's childhood part of life, then it will have strongest Effect on the way of their thinking and how they will respond to the future situations in life! In turn how they are going to live their lives!

Now where is the physics in this?

Every individual reaches the physical and mental comfort zone at one or the other part of life and once the state is attained ,they build a subconscious resistance to any possibility of change in the comfort zone.
If it is the social inertia then , It is proportional to the number of people in the same comfort zone.

I even say, every "Normal" human being is scared of any person or the group which can alter his/ her comfort zone with the minimal force applied.
This fear is the cause and the respect they demand is the effect !

If we start looking at things like this then .. we can define our life with the rules of Physics and Chemistry!