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The Physics PHYA2 thread! 5th June 2013 watch

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    What is the 6 marker predicted on?
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    Six marker topic variations up to June 2012


    Jan '10: Experiment to determine the Youngs Modulus of a metal wire. materials
    June '10: Energy changes of a gymnast as she jumps higher in the air on a trampoline. energy changes/mechanics
    Jan '11: Explain how a stationary wave is formed, and describe key features (on a diagram shown). waves
    June '11: Double slit of known separation: Describe measurements to be taken to find the wavelength of the light. waves
    Jan '12: Describe a procedure to determine and accurate value for the wavelength of a laser. waves
    June '12: Experiment to determine the spring constant k, of a spring. materials


    I haven't seen the January 2013 paper so I don't know what the topic was for that paper.

    They seem to like waves questions though... which is convenient as I detest ​waves.
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    (Original post by UnknownOrigin)
    Six marker topic variations up to June 2012


    Jan '10: Experiment to determine the Youngs Modulus of a metal wire. materials
    June '10: Energy changes of a gymnast as she jumps higher in the air on a trampoline. energy changes/mechanics
    Jan '11: Explain how a stationary wave is formed, and describe key features (on a diagram shown). waves
    June '11: Double slit of known separation: Describe measurements to be taken to find the wavelength of the light. waves
    Jan '12: Describe a procedure to determine and accurate value for the wavelength of a laser. waves
    June '12: Experiment to determine the spring constant k, of a spring. materials


    I haven't seen the January 2013 paper so I don't know what the topic was for that paper.

    They seem to like waves questions though... which is convenient as I detest ​waves.
    The January 13 six marker was about the formation if standing waves


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    (Original post by Jimmy20002012)
    The January 13 six marker was about the formation if standing waves


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    Ah right okay cool.

    Well then its looking more likely to be a question on something other than waves.

    Although that is a very hopeful statement lol

    If they did decide to do waves, I don't see why they couldn't ask a question to describe an experiment and procedure to determine the refractive index of something. Although that seems a bit easy to me... idk
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    (Original post by UnknownOrigin)
    Ah right okay cool.

    Well then its looking more likely to be a question on something other than waves.

    Although that is a very hopeful statement lol

    If they did decide to do waves, I don't see why they couldn't ask a question to describe an experiment and procedure to determine the refractive index of something. Although that seems a bit easy to me... idk
    I think there is a strong possibility of materials coming up again
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    Resitting this exam, last time I did it was January 2012 :eek: so teaching it all myself again.

    Didnt like the teacher I had for waves the first time round, but from unit 4/5 I'm starting to understand them now mechanics is great :')


    Resitting coz I have another 29 UMS I could pick up, which would definitely help me overall.

    I need 111 to get a B which I need for uni, and that's from unit 5 & 6 , so picking up another 25 would be great

    Does anyone happen to have the January 2013 paper?


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    How do you know when to use suvat equation or other equations such as v=s/t?


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    (Original post by Jimmy20002012)
    How do you know when to use suvat equation or other equations such as v=s/t?


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    v=s/t is essentially using the suvat equation s=ut+1/2 (at^2)

    You use it for horizontal motion generally, so your acceleration is zero, therefore getting rid of the 1/2 (at^2) and just having s=ut which rearranges to u=s/t

    In this case it doesn't matter if you used u or v as speed is constant.

    But yeah, assuming you're talking about projectiles or something, s=ut for horizontal motion, s=ut + 1/2 (at^2) for vertical

    Hope that helps


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    (Original post by SortYourLife)
    v=s/t is essentially using the suvat equation s=ut+1/2 (at^2)

    You use it for horizontal motion generally, so your acceleration is zero, therefore getting rid of the 1/2 (at^2) and just having s=ut which rearranges to u=s/t

    In this case it doesn't matter if you used u or v as speed is constant.

    But yeah, assuming you're talking about projectiles or something, s=ut for horizontal motion, s=ut + 1/2 (at^2) for vertical

    Hope that helps


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    Okay, thanks There are some questions where you think you have to use suvat equations but you don't, how do you know?


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    (Original post by Jimmy20002012)
    Okay, thanks There are some questions where you think you have to use suvat equations but you don't, how do you know?


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    Erm, have you got any examples? :s



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    (Original post by SortYourLife)
    Erm, have you got any examples? :s



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    How about 1c on the attachment, apparently using v=s/t and reaggranging it to find t doesn't work??


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    (Original post by Jimmy20002012)
    How about 1c on the attachment, apparently using v=s/t and reaggranging it to find t doesn't work??


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    Well here the diver is falling vertically, so you have to account for the acceleration due to gravity


    S=54
    U=0 (starting from rest)
    V= (we do know it from part b, but not really necessary, better to use values that we know are true)

    A= acceleration due to gravity, 9.81
    T= what we want to calculate.


    S= ut + 1/2 (at^2)
    54 = 1/2 * 9.81* t^2

    And blah blah blah.


    You don't use s= ut as there is acceleration due to gravity involved as its vertical motion.


    Ill try and find an example where you'd have to use both


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    (Original post by Jimmy20002012)
    How about 1c on the attachment, apparently using v=s/t and reaggranging it to find t doesn't work??


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    Try looking at this, it has a couple of examples that they like asking in exams
    http://www.s-cool.co.uk/a-level/phys...nd-acceleratio



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    When looking at two waves how do we know if they are in phase or out of phase and does maxima basically mean the maximum amplitude?


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    Anyone finding the legacy questions harder than the current past paper ones?
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    (Original post by UnknownGuy)
    Anyone finding the legacy questions harder than the current past paper ones?
    what are those questions?
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    Can anyone help me with June 2010 6A pleasee
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    (Original post by h94k)
    Can anyone help me with June 2010 6A pleasee
    What you struggling with?


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    Chapters 7&8 :'( kmn

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    (Original post by eilish1903)
    Chapters 7&8 :'( kmn

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    The mechanics? I love that bit ! It's waves I struggle with, but then again I loved the teacher I had for mechanics and hated the one I had for waves and optics and everything when I learnt it the first time round


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