Up to this moment, I started to learn some concepts in work-theorem. I am not sure what can this theorem bring us, can anyone tell me the uses of this theorem apart?

Its just to work out how much energy is required to do a job. EG lift something 1M off the ground, or push it 1m to the side against friction, I tyhink that what you are wanting to know.,

How does it contribute greatly to physics? I know it does but I am just learning very basic things

Its like most things, there doesnt seem like much of what is know is worth anything.

"work" is just another term for energy expended over time.

"Work" itself has no quantative value.

and may aquire several different meanings within the contexts of discussion.

 

and yes it`s VERY Important in Physics!

"Work" in all it`s manifestations is critical to your lessons and understanding )

Work is quite important in just about every science. Or not. Well, in some anyway. And it's important in cars and such too.