Results 1 to 5 of 5

Thread: Mechanics Geometry

  1. Jun 1st 2008, 08:31 AM #1
    Simplicity
    Simplicity is offline
    Super Member
    Joined
    Sep 2007
    Posts
    528
    Awards
    1
    MHF Donor

    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.
    Follow Math Help Forum on Facebook and Google+
  2. Jun 1st 2008, 08:44 AM #2
    bobak
    bobak is offline
    Super Member
    Joined
    Oct 2007
    From
    London / Cambridge
    Posts
    591
    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
    Follow Math Help Forum on Facebook and Google+
  3. Jun 1st 2008, 08:54 AM #3
    bobak
    bobak is offline
    Super Member
    Joined
    Oct 2007
    From
    London / Cambridge
    Posts
    591
    I attached the formula you will be given in your M3 exam if your interested in it.

    Bobak
    Attached Files Attached Files
    Follow Math Help Forum on Facebook and Google+
  4. Jun 1st 2008, 08:54 AM #4
    Simplicity
    Simplicity is offline
    Super Member
    Joined
    Sep 2007
    Posts
    528
    Awards
    1
    MHF Donor
    ...And what did they do to get \tan \theta? What rule is it that says external angle equals that of the internal?

    Follow Math Help Forum on Facebook and Google+
  5. Jun 1st 2008, 08:57 AM #5
    bobak
    bobak is offline
    Super Member
    Joined
    Oct 2007
    From
    London / Cambridge
    Posts
    591
    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
    Follow Math Help Forum on Facebook and Google+
« Two Elastic String | particle question »

Similar Math Help Forum Discussions

  1. [SOLVED] Finite Geometry: Young's Geometry
    Posted in the Advanced Math Topics Forum
    Replies: 0
    Last Post: Sep 15th 2010, 07:20 AM
  2. Maths Mechanics SUVAT mechanics
    Posted in the Calculus Forum
    Replies: 2
    Last Post: Apr 27th 2009, 04:55 PM
  3. Maths Mechanics SUVAT mechanics
    Posted in the Pre-Calculus Forum
    Replies: 1
    Last Post: Apr 27th 2009, 03:44 PM
  4. Modern Geometry: Taxicab Geometry Problems
    Posted in the Differential Geometry Forum
    Replies: 0
    Last Post: Mar 30th 2009, 07:32 PM
  5. complicated geometry in mechanics
    Posted in the Geometry Forum
    Replies: 4
    Last Post: Jan 16th 2009, 04:17 PM

Search Tags


/mathhelpforum @mathhelpforum