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    xmirxtimex's Avatar
    xmirxtimex Posts: 5, Reputation: 1
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    #1

    Jul 5, 2009, 09:20 AM
    Ladder of Mass Free Body Diagram
    Sebastian has drawn a free-body diagram for a ladder of mass m leaning against a frictionless wall. His diagram is shown below.




    a. "fs" is in the wrong direction.
    b. Vector P should be directed upwards, not down.
    c. Vector P should be perpendicular to the wall, not parallel to it.
    d. Vector N should be down into the floor for "fs" to have the given direction.
    e. Vector P is correct, but there should also be a force perpendicular to the wall.
    Unknown008's Avatar
    Unknown008 Posts: 8,076, Reputation: 723
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    #2

    Jul 5, 2009, 11:57 AM

    I think the wrong point is b. The vector should be perpendicular to the ladder.
    xmirxtimex's Avatar
    xmirxtimex Posts: 5, Reputation: 1
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    #3

    Jul 5, 2009, 05:52 PM

    Yes thank you, I thought it was B also, I just wanted a second opinion. I also realize I typed in "fs" instead of "fg"
    Unknown008's Avatar
    Unknown008 Posts: 8,076, Reputation: 723
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    #4

    Jul 6, 2009, 10:23 AM

    Lol, well, the 'g' was so small, I thought that was an 's'. Glad I was able to help! :)
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