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    Hi, please can anyone help on these questions?

    See the attatchment for the first question, here's the second:

    The crew of an anti-aircraft gun are engaged in target practice.
    A pilotless aircraft is released form a point more than 10km north of the gun, and is set to fly on a southerly couse at a height of 5250 metres.
    The gun fires its shells with an initial speed of 350m/s.
    i) If the shell is fired at an angle θ to the horizontal, and is at a horizontal distance x metres from the gun when it is at the height of the aircraft, show that T=tanθ satisfies the quadratic equation:

    x²T² - (2.4*104)xT + (x² + (1.3125*108)) = 0

    The aircraft flies at a steady speed of 100m/s, and the aim of the gun crew is to hit it as soon as it comes within range.
    Find:
    ii) The greatest value of x at which it can be hit.
    iii) The angle to the horizontal at which the shell should be fired.
    iv) The angle of elevation of the aircraft from the gun at the instant when the shell should be fired.

    Thanks for any help you can give.
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    Anybody? Please!
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    Come on.............
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    (Original post by bobmalouchy)
    x²T² - (2.4*104)xT + (x² + (1.3125*108)) = 0
    I got a different value here = (2.5*104)xT
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    that's way beyond me... surely this isn't going to be in the m2 exam

    the only differenciation i have to do in questions is converting s --> v --> a in my exam (nothing as bad as the above - even though i'm sure it's perfect Fermat )
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    (Original post by Revenged)
    that's way beyond me... surely this isn't going to be in the m2 exam

    the only differenciation i have to do in questions is converting s --> v --> a in my exam (nothing as bad as the above - even though i'm sure it's perfect Fermat )
    I was wondering about that!
    It seemed pretty difficult, and after I posted I started wondering also if M2 did max and min stuff??
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    not for Edexcel... but this is OCR so i dunno

    i have a bad view of OCR because they invented Advancing Physics B, which is awful!!! I'm so glad I do Edexcel maths instead of OCR because i'm sure they are a million times better...
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    Hre's the other one.

    I'm not too sure about my answers to this one.

    There are only 3 marks for part (i) and 7 marks for part (ii), yet my working for both parts was almost identical!!
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