Wednesday, 25 December 2013

All about Mechanics

Mechanics is one of the most important part of Physics in JEE.
It has huge weightage and not having a command on this part will definitely pull down your rank.
It's important because it has large applications in thermodynamics, electromagnetism as well as in modern physics so being expert in this part helps you to understand the subject better.
Here is a chapterwise analysis of mechanics:

Kinematics: First chapter of mechanics. It's mainly mathematics with a little bit of physics. Knowing calculus is important to understand this chapter. Definitions in this chapter must be absolutely clear and yes focus mainly on projectile motion(especially projectile motion along an inclined plane).
Laws of motion: "backbone of classical physics". Newton's second law is everything here. Practice it well and apply it with caution. Constraint relations form an important part and a number of questions are framed from this topic. Most students face problem in friction part. And yes paper setters know it!
Work, power, energy: work energy theorem and law of conservation of mechanical energy are two important laws that need to be mastered. Don't leave small things out here. In competitions they even ask the units and conversions(for example 1HP = ? Watts).
Center of mass and momentum: another important chapter. The law of conservation of linear momentum is very important and a number of questions are asked from it. Mixed questions from these 4 chapters are common in JEE.
Gravitation: not so important from the point of JEE but very important of you are and olympiad aspirant. If you are done with electrostatics then this chapter is a cakewalk.
Rigid body dynamics/rotational mechanics: most important chapter for JEE mechanics. It was the favourite chapter of paper setters in JEE 2012. Difficult for most students and sometimes confusing too. You are expected to know the formulae, moment of inertia for simple objects, the theorems on inertia, and most importantly - law of conservation of angular momentum. This law combined with law of conservation of linear momentum is used to solve the problem of collisions which is another favourite for competitive exams. Another aspect is impulse momentum theorem and the angular equivalent of the theorem. Brilliant questions have been asked in JEE from this chapter. Even for olympiads, this one is important. Practice this chapter patiently and learn to apply the equations and theorems correctly. Give this chapter extra time.
Simple Harmonic Motion: Another simple yet interesting chapter. Spring mass system is it all about! Make sure you take the help of Work energy theorem to solve the problems of this chapter. All the above chapters are used in solving problems of this chapter.
Fluid mechanics: Pascal's law , Archimedes Principle , Bernoulli's Equation and Equation of continuity are the 4 most important aspects of this chapter. You must be familiar with pressure calculations in different situations. This chapter might prove to be difficult for some (including me).
Elasticity: Easiest chapter of mechanics. Learn the definitions by heart and apply them.
The recommended books have already been mentioned in another post. Important theorems / laws have been underlined and are expected to be known perfectly.

92 comments:

  1. I am in class X right now (giving JEE in 2016) can in start studying physics right now? If yes then how much portion should be completed till class X?
    Also Please write on how you utilized the summer break between class X and XI

    ReplyDelete
    Replies
    1. Well first of all I would say prepare for your board exams well. You'll get plenty of time to prepare for JEE so worry not.
      Still if you want to try something then I would recommend learning a bit of calculus.
      Learn differentiation and integration.
      These are topics of maths but are going to help you in the first chapter of physics - kinematics.
      Also you'll be covering a topic of maths too.
      So double bonus.
      Also calculus is fun!
      And has huge weightage in JEE syllabus

      Delete
  2. Hi AMAN,

    What is the best way to revise class11th chapters along with 12th class preparation? When did you finish up with your class12th preparation?

    ReplyDelete
  3. First - this is not the ou. On revision.
    You shouldn't be posting revision stuff here.
    Post your revision related doubts on the revision strategy post so that others also get to see it.
    Grouped/classified doubts are easier to find.
    So post it there and I'll reply there itself

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  4. a more than helpful post..thnxx...looking forward to many such posts...!!

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  5. I am able to solve mechanics part easily from HCV, but I don't find myself confident while solving DC Pandey. What should be my strategy now ?

    ReplyDelete
    Replies
    1. Your concepts aren't clear. Otherwise dc pandey is no big deal.
      Try to revise the concepts.

      Delete
  6. Hi AMAN,
    I wanted to ask you that presently i am busy in revising class11th chapters which i had done recently, also i have started studying a few 12th class topics like ELECTROSTATICS in physics but i needed your suggestion regarding chemistry, as to which chapter can be studied now of class 12th because presently in Fiitjee we are studying GOC, PLEASE SUGGEST SOMETHING RELATED TO ORGANIC CHEMISTRY?

    ReplyDelete
    Replies
    1. Nothing you said involves mechanics.
      I humbly request you to post your doubts at correct place so that others also get to learn from your doubts.

      Delete
  7. I have completed class XI standard physical chemistry upto level between jee and board and math upto board level only in physics due to calculus suru me hamko kuch samaj me hi nahi aaya isliye physics utna nahi padhe but ab sab samaj me aa raha h
    I KNOW THAT I CAN COVER HC VERMA NCERT CHEMISTRY 1AND2 AND MATH ALREADY COVERED TILL 11 CLASS FINAL EXAMINATION
    but I doubt myself for preparation of iit can I Do it?? I am feeling very ashamed of myself that I almost wasted initial 6 months of 11 due to laziness
    please tell me honestly kya mere pass time bacha h iit preparation ka plz tell honestly

    ReplyDelete
    Replies
    1. You have a lot of time.
      Study seriously, decide your priorities, work hard and everything will be fine.
      Stop worrying and come out of it otherwise you won't be able to move ahead.

      Delete
  8. Thanks! Please post a article on Algebra next time.(as I and most of my friends and your blog readers too are finding it difficult and as it is most weighed section of JEE Mathematics.) Thanks for that in advance.

    and also (if it is possible) please post a guest experience (mainly Anand bhoraskar/Pranjal Khare/Karan Vaidya) on your blog. It will help us to also gain the strategy and tactics followed by other toppers of JEE-13.

    ReplyDelete
    Replies
    1. Sure.
      Our college is starting from 6th of Jan.
      I'll request them to write their experience too

      Delete
    2. This comment has been removed by the author.

      Delete
  9. Hey aman this is pranjul ,
    I have wasted my 8 months
    due to some reasons . Im in class 11 and
    now I,ve stared my preperation
    in looking for a single digit rank in jee advance and I don,t go for
    coaching .. I just want to ask u that is the lefted
    time sufficient to accomplish my target ..
    for jee 2015 I,ve decided to give 10 months time from jan 2014 to october 2014 and the lefted 6 months for revision and boards preperation . I,ve have only covered some topics ,though my calculus is quite strong and ice done some course in physics .. But there is no progress in chemistry and maths .. I,m very good in time management and have a average IQ . Is my target still possible to achive ??

    ReplyDelete
    Replies
    1. All I would say is "yes".
      All u need is motivation, dedication and concentration.

      Delete
    2. Thank you I know I can and yes you are totally right .
      god bless you u are going very well with ur blog !!
      keep up the good going work

      Delete
  10. Hello! Can I have your email id?

    ReplyDelete
  11. a similar post on algebra is needed

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  13. This comment has been removed by the author.

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  15. how did u regain your momentum when u used to fare badly in a test?

    ReplyDelete
    Replies
    1. I used to discuss my problems with my teachers. They were always there to motivate me whenever I felt down

      Delete
  16. Mechanics ke liye hcv enough hai kya???? PLz reply

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    ReplyDelete
    Replies
    1. what do you mean by "during d chug" ?
      Please type correctly

      Delete
  18. i want to ask u a very silly question
    please answer and don't ignore
    On an average how many days did u take to complete a single
    chapter for jee (i'm not asking the least or the max. i want
    only the average)

    ReplyDelete
    Replies
    1. Haven't measured it.
      Can't say anything
      I am forced to ignore.
      For me, JEE preparation was not class 11th, not just class 12th of 30 chapters.
      For me it was JEE syllabus. Something consolidated.
      I prepared all the chapters for 2 whole years so take the average to be around 1.5 years (6 months vacations :P)

      Delete
  19. How would you rate the FIITJEE physics package, particularly the level-2 section ?

    ReplyDelete
    Replies
    1. They are good. But they aren't good for basics.
      The questions of fiitjee packages assume that you already know the basics and are ready to solve advanced questions

      Delete
    2. So, does it make sense to solve H C Verma and then proceed to package rather than the other way around...?

      Delete
    3. Can't really say that, because I never read HC Verma fully

      Delete
  20. newtons law or energy method---------which one is more suggestible for finding time period in SHM (mainly the question where something related to rotation is is involved)

    ReplyDelete
    Replies
    1. Greatly depends on the type of question and of course your proficiency in the chapters
      If you find yourself comfortable with energy method, then go for it. Otherwise force method is always there.

      Delete
  21. I am really very weak at mechanics...I don't know why...but as I start doing those mechanics sum...I get nervous...Please give me some advise to get out of this...

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  22. thanx buddy... really helpfull..BUT I AM REALLY CONFUSED . i want to ask u what should i select STATE BOARD or CBSE BOARD which is best for scoring good marks,,,my class X board exams are over (giving JEE in 2016)... plzz tell me what should i select i want to score best in 11th and 12th and i have decided to do DUMMY,, i have done my class 10 from cbse board,, but i have decided dummy so what is good for scoring best in class 12 ,,, state board or cbse board,, and my friends said that state board is very easy as compared to cbse so I WANT YOUR answer or suggestion ... only one ans state board or cbse (for dummy) (PLZZ HELP)

    ReplyDelete
    Replies
    1. Please post on the correct post
      http://amangoeliitb.blogspot.in/2014/03/to-be-winner-start-early-post-for-those.html

      Delete
  23. Hi I am Shikhar giving JEE in 2016 when I was studying projectile motion from Resonance correspondence course there were 6-10 types of projectiles given but when I checked from JEE syllabus only 2 words were written "PROJECTILE MOTION" and nothing else What should I do should I learn all of them or only those which are given were asked in JEE till now. Also how can I remember all the formulas as I am weak in memorization

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  24. well if you are smart enough, then you will realize that there is actually just 1 projectile motion. All others can be derived from it in maximum 15 seconds (except 1 case that might need a minute).
    Go and explore it. It's interesting

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  25. i have serious problem in mechanic than any other topic in iit i have hcv and dc pandey and how can i improve my mechanic give usefull tips

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  26. hey. i am a jee-2015 aspirant 3 digit rank. i'm a bit weak in laws of motion and rotational mechanics. i want to become thorough in them. wat shud i do? wat i decided is: first thorough the concepts; then go through hcv, then solve most parts of dcp and then irodov sum parts. is this enuf to become very gud in these 2 chapters and also for physics in general?
    in laws of motion: i am weak at constraint relations especially. can u tell me a gud reference?

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  27. I am facing quite a few problems with projectile motion.I can do only the easy formula based numericals and as soon as there is a slight twist in the question I go blank and am not able to do even a few steps.But when I see the solution or somebody explains the numerical I find it quite easy.
    Please help and suggest a way to improve.

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  29. Hiii Aman bhaiya
    If fiitjee update rsm evry year or not ? if no ... so i don't need to join rsm bcoz i hv cmplte rsm package (year 2013-14) of fitjee .... i hav doubt .. plzz help me by giving ur answer ....
    plzz reply hurry

    thnk u

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  30. Aman Bhai....I am a JEE 2015 aspirant...
    I face a lot of trouble with physics many times when i dont get answers i get frsutrated and heavily disappointed in myself....moreover with mechanics my life has always been a struggle...and i try to give my best but it gets scrwed all the time...
    I have this really dumb teacher for physics, who is really mechanical and when i ask him any doubts he ends up confusing me and when i am unable to grasp it he demoralises me...
    please aman bhai can you tell me how to over come this fear of physics?

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  31. Hi Aman, I am a JEE 16 aspirant..
    I have joined a non-atending school but some topics from HC Verma are like i dont understand them pls suggest...

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  32. hi ,i am a jee16 aspirant. when should i complete my jee syllabus for getting a 3digit rank in advncd???

    ReplyDelete
  33. hello, i am jee 16 aspirant this year in 11th i have not done well enough and now i am tensed so much stressed that how to prepare for 11th plus 12th board this year can u pls give me sm suggestions that how to do well this year ...and the most worst thing is i have done only school level this yr can i do both 12th and 11th comptitive this tym by giving full efforts from mah side...plzz tell me i really need sm1 to motivate me this tym

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  34. May i get the right book for mechanics from ur side

    ReplyDelete
    Replies
    1. Read the last sentence of the post

      Delete
  35. What books should i refer to get into iit or bits

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  36. Sir,
    I am a jee 2017 aspirant.I am comfortable with hc verma,irodov and vidyamandir classes questions.I have solved all questions of all the mentioned books till friction.Do i need any other book for mechanics?
    Can u also pls suggest to me some methods to follow while studying rotational dynamics.I will be much helped by your advics.
    Thanking you,
    Yours sincerely,
    Partha Majumdar.

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  38. hi aman bhaiya i am finding difficulty in motion in a plane chapter so should i buy dc pandey mechanics to clear my understanding on the chapter?

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  39. Hi I am naveen!, I have started my jee preparation this year and i'm in 11th. Mechanics for me seems to be interesting and i feel good especially readin halliday resnick and solving problems in HCV and doing FIITJEE packages.But problem arises when it comes to solving I E IRODOV Problems. I'm unable to solve most of them.Even if i'm able to solve it takes a lot of time...Please help in this,Aman ji

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  40. I want to get a good command over mechanics. solving HCV without solution is tough for me. Plz suggest me how to get a good command over mechanics.

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  41. I want to get a good command over mechanics. solving HCV without solution is tough for me. Plz suggest me how to get a good command over mechanics.

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  43. Hello Aman!
    I Just Want To Say That You Are Doing Absolutely An Amazing Job Over Here.
    Highly Motivating Posts.
    I Have A Doubt.
    While Referring Halliday, Did You Go Through The Entire Book; Just The Concepts Or The Problems Or Both?

    ReplyDelete
    Replies
    1. Hello Arjun,
      Happy to hear that the blog helped you
      The idea was to read the book until I feel confident with the subject. I used to read the in-text problems carefully till I gained confidence in the topic

      Delete
    2. This comment has been removed by the author.

      Delete
  44. What should be the books for basics ...theory.
    Finding friction difficult to solve.....plz.help...plz.

    ReplyDelete
    Replies
    1. http://amangoeliitb.blogspot.in/p/books-section.html

      Delete
  45. I'm currently in 12 class and revising the portions
    but even now i'm not able to solve all problems from mechanics at single go what should i do now

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  46. Currently in class 11th. When the session started in the beginning of April, I didn't know the way to study, lack of seriousness etc. and due to this I haven't done important chapters like Stoichiometry, Kinematics, Trigonometry properly.How should I cover up since these chapters are done and dusted in my coaching institute?

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  47. Aman
    I am presently studying in class 12 and am a aspirant for IITJEE 2016.I have completed HC Verma problems from the first page till the last(both volumes) as well as previous years IITJEE papers.But i feel i need some more perfection.Could you recommend me a book that has MECHANICS PROBLEMS SIMILAR TO HC VERMA....you know what i mean....those sums from HCV where you do not need to much Integration and differentiation but Extensive thinking and IQ(the ones in the solved examples)...DC pandey and Fiitjee RSM are too Mathematical(I feel)...i need books which have the same approach to mechanics as HCV..please help

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  48. Hey bro..Do you think that the ie irodov's mechanics book is useful for jee...
    Must know before studying:)

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  49. Hello sir presently I'm in class 10 and I have finished hc Verma till rotation and geometric optics including electrostatic (except capacitance) current ,magnetism ,photoelectric effect and atomic physics and some from Dc Pandey and I'm. Confused that which next chapter I should do in physics and my first phase of class 11 completed (FIITJEE 4 year school program ) and now I have about 2 months left to start my new session can u please tell me what other topics should I do in all three subjects (except board preparation)

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  50. Hi aman iam entering class 11 tgis year . i have joined fiitjee pinnacle program for iit jee .please suggest me how to start my preparation .also should i buy the books now or after april by consulting with teachers .

    ReplyDelete
    Replies
    1. First consult your teachers. They know the best. Next take a complete two week rest. Spend time with your parents,friends,relatives,etc..Also read some motivational tips and guides by JEE toppers.These things will surely keep you motivated throughout. For motivation is one of the key factors in your JEE preparations. Lastly the day you begin your JEE preparation take the blessings of your parents and Almighty God. Here's hoping a successful JEE 2018 for you:p.

      Delete
  51. Hello Aman .....I want to know about how to get confidence on each chapter of jee syllabus , and, is it possible to qualify jee main and advance by self study after 12th pass....?????

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  52. I m not up to the mark with 11th physics so I want to ask the preffered book that could help me do physics portion specially mechanics and doing class 12th portion alongside. I have 1 month holidays left from school and presently in class 12. Please tellthe procedure too..

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  53. I have read H.C. Verma and tried to solve the problems. I could do most of them but when I shifted to Irodov, I couldn't solve a single problem. I am very confused. What should I do so that I am eligible to solve Irodov or Krotov problems. I would give JEE Advanced in 2018 and am also targetting InPhO...

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  54. Hi!aman, Is resnick halliday covers all chapters of jee syllabus.

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  55. I'm a new to class11 and please suggest me books for basic concept of calculus for physics.

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  56. Hey Aman,
    I am in 11th right now. I wanted to know what I should study during my winter break and during my summer break in 12th.
    Thanks

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  57. I'm finding it difficult to apply concepts from the chapter centre of mass and collision. I'm getting confused over where to apply what and where not to. Could you please refer me a better source/ approach to solve this problem.
    PS- I've sufficient time to spend on increasing my concept proficiency.

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  58. Bhai. I'm giving JEE 2017. I completed my FIITJEE packages, previous IIT questions, and Irodov. I just need more questions like Irodov ones.

    ReplyDelete
    Replies
    1. We just launched a platform for this!
      Here is the link: https://amangoeliitb.blogspot.in/2016/10/introducing-new-daily-practice-platform.html

      Delete
  59. Hey aman I have questions when should a person solve ie irodov suppose if I want to solve kinematics in it1) after completing chapter 2)after completing 11th 3)after completing whole mechanics which is best one and plz reply soon

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  60. Hey aman I have questions when should a person solve ie irodov suppose if I want to solve kinematics in it1) after completing chapter 2)after completing 11th 3)after completing whole mechanics which is best one and plz reply soon

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  61. Hi
    Aman Goel can you please recommend me a book for rotational mechanics.
    I am class XI student should I focus more on school or on coaching.
    Can you please also provide me a good time table please.

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  62. Is it preferable to solve level 2 subjective questions from DC Pandey

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  63. Is it preferable to solve level 2 subjective questions from DC Pandey

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