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I was just wondering if there is any formal proof that two

  1. Jun 24, 2011 #1
    i was just wondering if there is any formal proof that two perpendicular vectors don't affect each other
    i mean i do know that and understand it physically
    for example that gravity does not have any affect on the horizontal component of the velocity of a projectile
    but is there some proof of this
     
  2. jcsd
  3. Jun 24, 2011 #2
    Re: vectors

    Hello cyber paradox, welcome to physics forums.

    What do you think about it?
     
  4. Jun 24, 2011 #3
    Re: vectors

    thanks
    i think there must be some proof of it.
     
  5. Jun 24, 2011 #4
    Re: vectors

    do you know any?
     
  6. Jun 24, 2011 #5
    Re: vectors

    You basically said it yourself. Orthogonal vectors can't be projected onto eachother, their inner product equals zero. I don't think this can be proven any further, it's quite trivial.
     
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