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Homework Help: Moment and cross product

  1. Oct 12, 2011 #1
    F = 5i + 3j Newtons acts 3 m to the right of the origin (x is horizontal and y is vertical). What moment does this force produce about the origin? Use the vector cross product.
    "Great works are performed
     
  2. jcsd
  3. Oct 12, 2011 #2

    SteamKing

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    OK, show us what you have tried.
     
  4. Oct 12, 2011 #3
    I really dont know where to start, b/c I dont understand how I am suppost to use the cross product with one vector.
     
  5. Oct 12, 2011 #4

    SteamKing

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    Who says you have only one vector? Remember, a vector has magnitude and direction.
     
  6. Oct 12, 2011 #5
    Does this help?

    [itex]\bar{M}_{o} = \bar{R}[/itex] X [itex]\bar{F}[/itex]
     
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