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Action reaction

  1. May 12, 2005 #1
    hit a wall,u feel pain,what kind of forces r involved,r they electrodynamic?
  2. jcsd
  3. May 12, 2005 #2
    A contact force.
  4. May 12, 2005 #3
    your nerve endings emit an electric pulse to the brain indicating pain.

    the actual contact between your hand and the wall is electrostatic in nature because the stopping force is due to electromagnetic repulsions between atoms in your hand and those on the wall.
  5. May 12, 2005 #4
    how r they electromagnetic,please explain.
  6. May 12, 2005 #5
    It is the normal force that is stopping your hand. The normal force is an electromagnetic force.
  7. May 12, 2005 #6
    why is normal force an electromagnetic force?
  8. May 12, 2005 #7
    What other kind of force would it be?
  9. May 12, 2005 #8
    u must be right,but tell me how is it an electromagnetic force?
  10. May 12, 2005 #9
    The force is the result of the electron shells repelling each other.
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