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Newton 3rd law of motion: help please

  1. Sep 19, 2010 #1
    my question is as follows.

    when an object x exerts a force on object y, then object y exert a force of the SAME TYPE that is equal in magnitude and opposite in direction on object x

    Explain what is meant by of the same type in this statement?
  2. jcsd
  3. Sep 19, 2010 #2


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    Hi sanscie and welcome to PF. It means that if x exerts, say, an electric force on y then y exerts also an electric force on x. Furthermore, the mathematical expressions that give the magnitudes of the two forces are identical, only the directions are opposite.
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