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In our universe, how many forces are there ?

  1. May 13, 2005 #1
    In our universe, how many forces are there ?
    I know Newton force ma=F and whozum just reminded me of electromagnetic force F~r, so where are the other two ?
     
  2. jcsd
  3. May 13, 2005 #2
    strong and weak nuclear forces, gravity, and electromagnetic
     
  4. May 13, 2005 #3
    F=ma is not a type of force, its a relationship between force and acceleration. The four are those that seiferseph just mentioned.
     
  5. May 13, 2005 #4
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