1. PF Contest - Win "Conquering the Physics GRE" book! Click Here to Enter
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

What formula can I use?

  1. Sep 3, 2015 #1
    What formula can I use the time it takes an object to travel 402m if it starts at rest and accelerates at 17m/s?
  2. jcsd
  3. Sep 3, 2015 #2


    User Avatar
    Science Advisor
    Homework Helper
    Gold Member

    ##s=ut+\frac{1}{2}at^2##, where

    s = distance travelled
    u = initial velocity
    t = time
    a = acceleration

    Use the formula for the solution to a quadratic equation to write t as a function of the other, known, variables.
  4. Sep 3, 2015 #3
    Thank you
  5. Sep 3, 2015 #4


    User Avatar

    Staff: Mentor

    Welcome to the PF.

    What is the context of your question? Is it for schoolwork, or a practical question from some situation? Schoolwork questions need to be posted in the Homework Help section of the PF, and there are rules for posting schoolwork questions there. We're here to help; we just need to treat schoolwork questions in a special way that helps student learn how to learn. :smile:
  6. Sep 4, 2015 #5


    User Avatar
    2017 Award

    Staff: Mentor

    17m/s is not an acceleration, it is a velocity.
  7. Sep 4, 2015 #6


    User Avatar
    Science Advisor

    Since u=0, you get t by a square root.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook