I am trying to self-study this lesson...someone pls tell me how to start....

Dear Gauri

First you should refer H C VERMA and Resnick & Halliday for the theory part .and see the solved example of  this chapter  and then try to solve excersice problem.After that you should see the previous years IIT JEE problem based upon this topic..Try to solve as much problem as you can on this topic.

Just stay calm and focus on understanding rather than mugging. Be regular in class and stay with concepts

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Regards,
Askiitians Experts
Badiuddin