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    https://www.undergraduate.study.cam....paper_2016.pdf

    Hi, im struggling to do question 51- I have tried drawing it (have a horizontal parabola) and a straight line but where do i go from there?
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    (Original post by bruh2132)
    https://www.undergraduate.study.cam....paper_2016.pdf

    Hi, im struggling to do question 51- I have tried drawing it (have a horizontal parabola) and a straight line but where do i go from there?
    I also dont know how to do question 53 if anyone can help
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    For 53. Search for Descartes rule of signs
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    (Original post by yukeming)
    For 53. Search for Descartes rule of signs
    just looked it up but I only see two change of signs in the polynomial? maybe I dont get it

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    Bro question 51 or 53 the area under graph is ****ed up. U equate both function to find out the intersection is at y equal 0 and 2. Then u realize the x equals 7 is always bigger than the other function . So integrate 7 minus the other function from y equals 2 to y equals 0. That question cannot be done in 90 seconds . Don't bother
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    (Original post by yukeming)
    Bro question 51 or 53 the area under graph is ****ed up. U equate both function to find out the intersection is at y equal 0 and 2. Then u realize the x equals 7 is always bigger than the other function . So integrate 7 minus the other function from y equals 2 to y equals 0. That question cannot be done in 90 seconds . Don't bother
    yup I hardly get it and tbh yh timing is so messed up I don't get how anyone could finish the test, Im just aiming for 50% now if im lucky
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    (Original post by bruh2132)
    yup I hardly get it and tbh yh timing is so messed up I don't get how anyone could finish the test, Im just aiming for 50% now if im lucky
    Bruh can u tell me why spring 3 is the answer to "
    which sample does not obey hooke's law up to 2 percent strain"
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    (Original post by yukeming)
    Bruh can u tell me why spring 3 is the answer to "
    which sample does not obey hooke's law up to 2 percent strain"
    what question?
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    (Original post by bruh2132)
    what question?
    2016 section 2 question 1
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    (Original post by yukeming)
    2016 section 2 question 1
    well basically I did x/(delta)x= 2% = 0.02
    since x= 100mm you can work out (delta) x and from there you can look at the graph at that extension and see which isn't a straight line
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    (Original post by bruh2132)
    well basically I did x/(delta)x= 2% = 0.02
    since x= 100mm you can work out (delta) x and from there you can look at the graph at that extension and see which isn't a straight line
    I thought strain is equals to Delta x/ x?
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    (Original post by yukeming)
    I thought strain is equals to Delta x/ x?
    yh sorry my mistake, it is deltax/ x and if you do it you actually get an extension of 2mm and if you look on the graph S2 is curved there
 
 
 
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