Add Headings and they will appear in your table of contents.
Sub : ENGINEERING MECHANICS
Experiment/Lab Name
Vlab Links
Newton's Second Law of Motion
http://vlab.amrita.edu/?sub=1&brch=74&sim=207&cnt=1
2. Collision Ball Theory
http://vlab.amrita.edu/?sub=1&brch=74&sim=197&cnt=1
3. Projectile Motion
http://vlab.amrita.edu/?sub=1&brch=74&sim=191&cnt=1
4. ELastic and Inelastic Collision)
http://vlab.amrita.edu/?sub=1&brch=74&sim=189&cnt=1