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!

Introduction Physics: Free Fall problem

  1. Sep 18, 2007 #1
    1. The problem statement, all variables and given/known data
    Divers in Acapulco, Mexico, leap from a point 36 m above the sea. What is their velocity when they enter the water?

    2. Relevant equations
    V^2=u^2+2as, probably wrong.

    3. The attempt at a solution

    s=36, u= 0, Find Final Velocity, a= -9.8 , I get some ridiculous number. Don't know how to start the problem.
  2. jcsd
  3. Sep 18, 2007 #2


    User Avatar

    If the acceleration vector is taken as negative, so too shall the displacement vector, thus you would not have any imaginary number.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook