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  1. J

    Mechanics - How to resolve forces for conical pendulums and banked tracks!?

    So I still do not have any sort of understanding on how to resolve the forces into their vertical and horizontal components for mechanics! Can anyone please offer an explanation in any form however!
  2. J

    2012 Extension 2 HSC Paper

    Hello, I'm currently doing past papers for study and whilst doing the 2012 paper I got really concerned when I was unable to do a lot of questions 15 and 16 as I just couldn't work out what they were asking for OR I just didn't know how to do it! Curious if anyone has any worked solutions to...
  3. J

    HSC 2013 Test Paper - HELP with mechanics

    Sorry to be pain but how do you go about drawing vertical and horizontal vectors? My teacher only touched on conical pendulums so it's not my strongest point!
  4. J

    HSC 2013 Test Paper - HELP with mechanics

    I understand that! I'm just used to having the vertical forces including Cos. I guess it is different when there are two strings?
  5. J

    HSC 2013 Test Paper - HELP with mechanics

    It makes sense but when you are resolving the forces vertically, where do you get TsinB - Tsin (QPS) = mg? I understand why it is equal to mg but i am unsure of the LHS. Similarly for resolving the forces horizontally i don't understand the LHS in TcosB + Tcos (QPS) = mrw^2 But thank you for...
  6. J

    HSC 2013 Test Paper - HELP with mechanics

    So I am having trouble with the understanding QUESTION 16 (b) parts (iv) and (v). I will link the test paper and the marking guidelines below but yet I am still having trouble with understanding the solutions. In general, when you are dealing with conical pendulums or even banked tracks, how do...
  7. J

    Probability question

    A hostel has four vacant rooms. Each room can accommodate a maximum of four people. In how many different ways can six people be accommodated in the four rooms? The answer is 4020.
  8. J

    Best Extension 2 Math book for Mechanics?

    It was good up until circular motion and now I'm having trouble understanding the questions! I understood all the concepts in class and even practice questions but I'm really struggling with the Terry Lee questions :L
  9. J

    Best Extension 2 Math book for Mechanics?

    I'm doing questions on circular motion and i'm finding that the questions from Terry Lee are confusing because they are either in some ways ridiculous, or they aren't explaining what you must do in the question very well. In your opinion, what is the best text book that I can use for Mechanics...
  10. J

    Atar Estimation Please

    Oh Im so sorry I forgot to add how many people there are in each subject! 1st/2nd out of 3 - Extension 2 Math 3rd/16 - Extension 1 Math 3rd/101 English standard 4th/45 - Visual Arts 3rd/4th out of 16 - Physics 15-20/74 Studies of Religion 1
  11. J

    Atar Estimation Please

    Hi, I have a goal ATAR of 97-98 but I did not do extremely well in my trial exams! Here are my ranks: 1st/2nd in Extension 2 math - separation by literally .7-1% (My overall mark throughout the year and after trials is 71%) 3rd in Extension 1 math - sitting on 38.6/50, first is on 41.1/50...
  12. J

    Atar estimate please

    Biology 20/60 Community and family studies 4/60 Pdhpe 10/65 Mathematics general 3/70 English 14/101 Studies of religion 1 29/65 School rank 240
  13. J

    Atar Estimate (new ranks)

    New ranks after half yearlies Extension 2 Mathematics: 1/3 Extension 1 Mathematics: 2/16 Physics: 3/18 English: 1/98 Visual Arts: 5/40 Studies of Religion 1: 15/84 School Rank: 240
  14. J

    Atar estimate please

    Extension 1 mathematics: 1/15 Mathematics advanced : 1/36 Physics: 1/18 English standard: 5/106 Pdhpe: 6/40 Studies of religion 1: 11/84 School rank: 224
  15. J

    Possible ATAR?

    Hey guys I'm wondering if you could tell me possible ATAR scores that I could receive based on my current rankings? Here are my ranks: 1st Extension 2 Mathematics (1/3) 2nd Extension 1 Mathematics (2/15) 2nd English Standard (2/50) 3rd Physics (3/18) 17 Studies of Religion 1 (thinking of...
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