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: Kinematics Question

  1. Mar 14, 2010 #1
    1. The problem statement, all variables and given/known data
    I had a problem with e
    http://img717.imageshack.us/img717/755/captureso.jpg [Broken]
    http://img34.imageshack.us/img34/1149/capture2vp.jpg [Broken]

    2. Relevant equations

    see below

    3. The attempt at a solution

    So I assumed that there was no y component of velocity once the ball reaches it's lowest point. I believe this to be a very legit assumption. Even the scoring guidelines made this assumption.

    The next thing that I did was use the velocity naught equation below that incorpates the velocity the acceleartion and the time in order to solve for the time

    i didn't know the velocit though so i solved it using the equation velocity squared equation that incorporates the velocity naught the acceleration and the displacement which i knew all the terms and solved for the final velocity

    i then solved for the time

    i was then able to solve for the horizontal displacement sense the step before asked me to solve for the velocity naught in the x direction

    The scoring guidelines confirmed my value i used for the horizontal velocity

    http://img44.imageshack.us/img44/5169/capturej.jpg [Broken]
    http://img502.imageshack.us/img502/8854/capture2fc.jpg [Broken]
    http://img37.imageshack.us/img37/4259/capture3fo.jpg [Broken]
    http://img686.imageshack.us/img686/9018/captureym.jpg [Broken]
    1. The problem statement, all variables and given/known data
    1. The problem statement, all variables and given/known data

    so i really do not see what i'm doing wrong here....
     
    Last edited by a moderator: May 4, 2017
  2. jcsd
  3. Mar 14, 2010 #2

    rl.bhat

    User Avatar
    Homework Helper

    Your calculation appears to be correct.
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook