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Free body Diagram Help

  1. Nov 4, 2007 #1
    1. The problem statement, all variables and given/known data

    Hey guys. My Physics teacher gave us an assignment to make a Free Body Diagram poster. He didn't give us any specifics, just told us that we can do whatever we want. I'm a little confused as to what I should do and how to make one of these. Could you give me an example of a pretty simple FBD and how to make it?


    2. Relevant equations


    3. The attempt at a solution

  2. jcsd
  3. Nov 4, 2007 #2
    In a free body diagram, you want to specify one object and separate it from everything else, hence the name "free-body." It would be good to indicate any forces acting on that body. Typical forces are the normal force and the weight force. It's also good to specify a coordinate system in your diagram. For a visual you can look here: http://en.wikipedia.org/wiki/Free_body_diagram
  4. Nov 4, 2007 #3


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    https://www.physicsforums.com/blog/2007/09/27/my-first-sketchcast-free-body-diagram/ [Broken]
    Last edited by a moderator: May 3, 2017
  5. Nov 4, 2007 #4
    Ok, but could you give me a real life situation that would be appropriate to make a FBD for?

    Thanks for the help
  6. Nov 4, 2007 #5


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    Suppose you sit on a frictionless slide in a playground.
    Determine the forces applied on you [which can be used to predict your motion].

    You might want to consider your preference of a steep slide vs. a not-so-steep slide.
    How would you analyze these choices?
    Last edited: Nov 4, 2007
  7. Nov 4, 2007 #6
    visit my blog for some examples

    http://www.mathlinks.ro/weblog.php?w=924 [Broken]

    a person in an elevator would be interesting, try that :-]
    Last edited by a moderator: May 3, 2017
  8. Nov 4, 2007 #7
    Thanks for the examples!
  9. Nov 4, 2007 #8
    Are weight and gravity used interchangeably?
  10. Nov 4, 2007 #9
  11. Nov 4, 2007 #10
    Ok so how does this look?
    Last edited: Nov 4, 2007
  12. Nov 4, 2007 #11
    how does what look?

  13. Nov 4, 2007 #12
    Oh, it was working before. Let me rehost it.

    http://img505.imageshack.us/img505/7315/2160606887199981820qx5.th.jpg [Broken]
    Last edited by a moderator: May 3, 2017
  14. Nov 4, 2007 #13
    can't see it ... way too small
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