Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Convention in parametric equation of parabola.

  1. Jun 25, 2011 #1
    general equation of parabola is y^2=4*a*x. it's parametric equation is ((a*t^2),(2*a*t)) [as in my book] but i think there can be other kind of parametric equations also like( ((t^2)/4*a),t) it defines a parabola easily. is using ((a*t^2),(2*a*t)) as parametric equation of parabola is convention or there is any reason for this.
    I think it's a convention but some question are specially based on this equation ((a*t^2),(2*a*t)) so i want to confirm is it really a convention or there is any other thing.

    thanks for reading. write your view.
  2. jcsd
  3. Jun 25, 2011 #2
    Hi vkash! :smile:

    There aren't really any good reasons for taking (at2,2at) as parametrization. The only good reason that I can think of is that we don't work with fractions with this parametrization, and fractions are sometimes annoying.
  4. Jun 25, 2011 #3
    thanks genius.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook