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    Well, question 3)c)ii) on this paper has got me stumped

    http://web.aqa.org.uk/qual/gce/pdf/A...4-W-SQP-07.PDF

    Despite using the exact same method shown in the mark scheme I have got a different answer and I cannot see how they have got the answer in the mark scheme! The answer I keep on getting is 5.53*10^12 kg but the mark scheme gives it as 2.4*10^24

    Here's the mark scheme;
    http://web.aqa.org.uk/qual/gce/pdf/A...4-W-SMS-07.PDF

    Please help!
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    (Original post by n_251)
    Well, question 3)c)ii) on this paper has got me stumped

    http://web.aqa.org.uk/qual/gce/pdf/A...4-W-SQP-07.PDF

    Despite using the exact same method shown in the mark scheme I have got a different answer and I cannot see how they have got the answer in the mark scheme! The answer I keep on getting is 5.53*10^12 kg but the mark scheme gives it as 2.4*10^24

    Here's the mark scheme;
    http://web.aqa.org.uk/qual/gce/pdf/A...4-W-SMS-07.PDF

    Please help!
    that was one tricky question..
    you need to reslove all the forces..
    Resolving Vertically
    Tcos(0.0011)=W

    where W=\frac{GM_Em}{R^2}
    Resolving horizontally one would get;
    Tsin(0.0011)=F
    The F is caused by the gravitational pull by the mountain
    which leads F=\frac{GM_mm}{(2.5)^2}

    Solving this simultaneously would then give your mass of the earth..
 
 
 
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