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Math Help - Mechanics Geometry

  1. #1
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    Mechanics Geometry

    Question:



    Answer:



    My Problem:
    I don't understand what they have done in the mark scheme where I have put a red box around the part that I don't understand. Please help. Thanks in advance.
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  2. #2
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    They are using a standard result, The center of mass of a uniform solid right circular cone is distance \frac{h}{4} from the base (where h is the height of it.)

    Bobak
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  3. #3
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    I attached the formula you will be given in your M3 exam if your interested in it.

    Bobak
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  4. #4
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    ...And what did they do to get \tan \theta? What rule is it that says external angle equals that of the internal?

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  5. #5
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    Quote Originally Posted by Air View Post
    ...And what did they do to get \tan \theta? What rule is it that says external angle equals that of the internal?

    the tangent is just a given, they didn't work it out they defined it to make working out the height a bit more interesting.

    Bobak
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