"Applied Mechanics" is very important for Civil Engineers. In your coming semesters, you are going to need it's concept for subjects like "Theory Of Structures"(II/II) , "Strength Of Materials" (II/I).
I feel that the concept of Beam And Frame , Truss, Moment Of Inertia and other similar topics must be clear for an civil engineering student.
If you're feeling bore attending lectures of "Beam And Frame" and "Truss" in your class, just leave the class. But in return, you must visit this link which is going to teach you the concept far better than your lecturers. And I'm sure that your level of concept will be far ahead than your friend's. One example is me. I almost skip the lectures of Beam And Frame and Truss because I'd already watched the videos and I was clear in it's concept.
The video for "Beam And Frame" for beginners:
I suggest you to view the video carefully. Don't skip any portion. The "Ellipse Rule" given in the video really helps you to find the nature of the curve in SFD and BMD. While viewing above link, you may also watch other videos of CTSCIVIL because it's for meant for Civil Engineering Students.
Hope it helps. And do write me if it really helped you.
--bibek tamang
