Time management is very much important in IIT JAM. The eduncle test series for IIT JAM Mathematical Statistics helped me a lot in this portion. I am very thankful to the test series I bought from eduncle.
Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Isha lohan 1
In mechanics Jam, most of the questions are same as jee mains advance. If you cover jee syllabus or say class 11 12th mechanics, it will be sufficient for jam also. if you want to practice more questions for mechanics you should refer to the mechanics exercises in HC VERMA VOL1. And to get more insight into mechanic jam ques try previous year papers. On your eduncle study portal you will easily find previous year paper and there answers.
which topics are more asked .... comparatively?
That depends on the board setting up questions. But usually one or two questions are permanently there from Rotational, Moment of Inertia and Centre of mass topic.