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Thread: 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 $\displaystyle \frac{h}{4}$ 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 $\displaystyle \tan \theta$? 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 $\displaystyle \tan \theta$? 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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