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Homework Help: How do you find time given vi, acceleration, and displacement

  1. Feb 22, 2012 #1

    d=vit+ 1/2at^2

    my subs are

    75 =3t +1/2 (9.81)t^2 (if an object is dropped is gravity still -9.81?)

    where do i go from here
  2. jcsd
  3. Feb 22, 2012 #2


    User Avatar

    Staff: Mentor

    Have you studied how to solve quadratic equations?
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