What is nptel? How can a first year mechanical student use it?
Nptel stands for national program on Technology enhanced learning.
This program basically provides online source to help students from different engineering backgrounds.
Professors from colleges like IIT Bombay, IIT Kharagpur upload the videos of their lectures on various topics.
As a mechanical engineering student you can view videos of subjects like fluid mechanics etc.
It's a great source of help for students.
Hope this helps and All the Best.