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    https://ca99c64778b62ba7e7b339967029...%20Edexcel.pdf

    How do i deal with moment about D at Q5a?

    Isn't that a weird position? I couldn't understand even I had a look on mark scheme. I get F x (2a) but not mgsin(theta)a

    Many thanks.
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    (Original post by Kamisama)
    https://ca99c64778b62ba7e7b339967029...%20Edexcel.pdf

    How do i deal with moment about D at Q5a?

    Isn't that a weird position? I couldn't understand even I had a look on mark scheme. I get F x (2a) but not mgsin(theta)a

    Many thanks.
    You need the moment of weight=moment of reaction.
    draw them on the diagram extend the line of weight and find perp distance to D.


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    (Original post by physicsmaths)
    You need the moment of weight=moment of reaction.
    draw them on the diagram extend the line of weight and find perp distance to D.


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    https://scontent.flcy1-1.fna.fbcdn.n...09&oe=575252BD

    here's what i drew , but i still dont get itignore the R=mgcos(theta) thing
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    (Original post by Kamisama)
    https://scontent.flcy1-1.fna.fbcdn.n...09&oe=575252BD

    here's what i drew , but i still dont get itignore the R=mgcos(theta) thing
    Here's my diagram:

    Forces in red.
    Lines of action of forces in green.
    Perpendicular distance of lines of action in blue.

    Edit: For some reason I can't get rid of one of the images.

    Name:  Untitled2.jpg
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Size:  28.7 KB
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    (Original post by ghostwalker)
    Here's my diagram:

    Forces in red.
    Lines of action of forces in green.
    Perpendicular distance of lines of action in blue.

    Edit: For some reason I can't get rid of one of the images.

    Name:  Untitled2.jpg
Views: 109
Size:  28.7 KB
    That's much clearer, thank you so much.
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    (Original post by Kamisama)
    That's much clearer, thank you so much.
    You're welcome.
 
 
 
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