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Understanding how a projectile that moves in a parabolic path

  1. Sep 28, 2010 #1
    I need help understanding how a projectile that moves in a parabolic path can have a point where a-> is parallel to v-> or perpendictular to v->
    Is this meaning that the lines tanget to the path are perpendicular or the actuall path?
    And i would think that both parallel and perpendicluar are ppossible, yes?
  2. jcsd
  3. Sep 28, 2010 #2
    Re: Pr0j3ctil3$

    Why the unusual thread title?
    Looks like a password :)
  4. Sep 28, 2010 #3


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    Re: Pr0j3ctil3$

    Well, a is always pointing downard. So what would it mean for v to be either parallel or perpendicular to that?
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