Dear leaner,

As in detail , physics is main and basic one regarding mechanical field , this subject pave your path with not even thar ,but with gold if you understand it well,

Mechanical field is the one which is probably create things ,study through design pipes,cars ,ships automobile and so on .

For any specific branch there will be always a 10th subject as a domain or perpetually important to us ,learn the basics ,and practice them very often.

All the best.