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Homework Help: The normal force

  1. Sep 27, 2005 #1
    In which cases is the normal force acting on an object simply mg, and in which cases is it something else? If it's not mg, how can I figure out what it is?
  2. jcsd
  3. Sep 27, 2005 #2
    the normal force depends on the situation. but you will always need to use newton's 2nd law.
  4. Sep 27, 2005 #3
    ok, so I don't really understand what the normal force is. By what is it exerted, by the ground? and it's not always upward, correct? it's perpendicular to the object, I think.
  5. Sep 27, 2005 #4
    you have normal when you have two objects that have contact. the direction is perpendicular to the contact surface. upwards or downwards will depend on which object you are referring.
  6. Sep 27, 2005 #5
    Ok, I got it, thank you.
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