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Homework Help: Force problem

  1. Nov 7, 2004 #1
    If I am holding a 10.0 kg book against the wall with a 30 degree angle between the book and my arm (angle measured closest to my hand out), how can I find the force (in Newtons) that I'm pushing with?
     
  2. jcsd
  3. Nov 7, 2004 #2

    Pyrrhus

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    Is the wall frictionless??
     
  4. Nov 7, 2004 #3
    Just to make sure we understand eachother: I'm holding the book against the wall by leaning on it with my hand, applying a force at a 30 degree (measured as stated in my OP).

    My understanding is that there has to be some friction against the wall otherwise I wouldn't be able to hold it there?
     
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