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    (Original post by KloppOClock)
    well you dont need the original position, i just used that formula to find velocity instead of location

    i used velocity and acceleration(t) instead of location and velocity(t)

    m and m/s vs m/s and m/s/s
    Ohhh
    didnt know you could do that thanks!
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    (Original post by Don Pedro K.)
    Wow yeah that is quite weird! Although, it may perhaps not be the full mark scheme, so it might allow 5/3 in 3.s.f?
    That's what I thought but :dontknow:
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    can someone tell me what r is ?
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    (Original post by metrize)
    You can choose what direction you want to call positive
    But the question tells you they're moving in opposite directions! So it doesn't make sense for you to label them as both positive!!

    Also why have you used -33/mu ??


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    Need help on 8d june 2005 please, don't understand where the mark scheme got "Distance travelled by 2nd player = 13.8 – 6 = 6.8"
    https://ce0f1d00673c9b9787bbeaa1aa08...%20Vectors.pdf
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    (Original post by djmans)
    can someone tell me what r is ?
    R is the final position vector, R0 is the initial position vector
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    (Original post by djmans)
    can someone tell me what r is ?
    current location depending on t
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    (Original post by Don Joiner)
    But the question tells you they're moving in opposite directions! So it doesn't make sense for you to label them as both positive!!

    Also why have you used -33/mu ??


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    look at my workings out that i posted before.
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    (Original post by KloppOClock)
    as i said before, if you use an aproxamation such as g in your answer, you have to round.

    In jan 2011 you were doing vectors which is fine.

    in june 2011 you assumed that gravity equals 9.8 so you must round to 2 or 3 sf.
    it says this on the front of the exam paper
    Ohhhh, got ya now, thanks! This exam's more pernickety than I thought, oh god
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    (Original post by Don Joiner)
    But the question tells you they're moving in opposite directions! So it doesn't make sense for you to label them as both positive!!

    Also why have you used -33/mu ??


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    P keep moving in the same direction, just watch examsolutions video if you dont understand its hard to explain in text.

    Impule acts in opposite direction of motion
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    (Original post by Kamara7)
    That's what I thought but :dontknow:
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    um hi, i have a question from a pulley section of the paper... https://drive.google.com/file/d/0B1Z...lHRkVGMUk/view - it is question 5b and the markscheme says the distance is times by 2 so the total distance is 0.6 but i dont understand why it is.

    markscheme: https://drive.google.com/file/d/0B1Z...FMWVV4ckU/view
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    What do you do when one vector is North-west or South-East etc of another vector?


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    (Original post by Don Joiner)
    What do you do when one vector is North-west or South-East etc of another vector?


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    when northwest vector is -i + j

    so get the i components equal to -m
    get the j components equal to m
    and solve
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    (Original post by KloppOClock)
    when northwest vector is -i + j

    so get the i components equal to -m
    get the j components equal to m
    and solve
    You know for that question you answered just know to do with being parallel to vector i? Did you get t = 3?
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    (Original post by KloppOClock)
    Name:  sdfjn.png
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    Interesting...

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    Maybe they recently included that because they didn't put that in the papers I was using
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    (Original post by Kamara7)
    Interesting...

    Name:  2016-06-07 (5).png
Views: 97
Size:  135.8 KB

    Maybe they recently included that because they didn't put that in the papers I was using
    2014+ , altho this has always been the case since 2001
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    (Original post by Don Pedro K.)
    You know for that question you answered just know to do with being parallel to vector i? Did you get t = 3?
    which question was this again?
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    (Original post by KloppOClock)
    which question was this again?
    the one where the guy forgot the say which vector it was parallel to in the OP.
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    (Original post by KloppOClock)
    2014+ , altho this has always been the case since 2001
    And I literally find this out the day before the exam :lol: I probably would've lost a lot of unnecessary marks in the exam tomorrow if I didn't know this, I'll thank you again :adore: I hope there aren't any more of these subtleties I don't know about...
 
 
 
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