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

Homework Help: Find the maximum value

  1. Feb 7, 2010 #1
    1. The problem statement, all variables and given/known data
    A criminal is escaping across a rooftop and runs off the roof horizontally at a speed of 5.7 m/s, hoping to land on the roof of an adjacent building. Air resistance is negligible. The horizontal distance between the two buildings is D, and the roof of the adjacent building is 2.0 m below the jumping-off point. Find the maximum value for D.

    3. The attempt at a solution
    s=ut + .5at^2, so t^2 = 2s/g = (2 x 2)/9.81, t=0.4077, then do .4077 x 5.7 = 2.324 m, but that answer is wrong. I have no idea what is going on here, please help.
  2. jcsd
  3. Feb 7, 2010 #2
    Re: Help

    Check your math, did you take the square root of (2 x 2)/9.81?
  4. Feb 7, 2010 #3
    Re: Help

    It was my math, thanks! I could not figure out what I was doing wrong!!
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook