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 in X direction

  1. Sep 20, 2007 #1
    You throw a ball with a speed of 31 m/s at an angle of 40.0° above the horizontal directly toward a wall (Fig. 4-35). The wall is 22.0 m from the release point of the ball.

    04_30.gif

    (a) How long does the ball take to reach the wall?

    I got .96 seconds

    31m/s Cos(40) = 23.7m/s

    22m/23.7m/s = .96seconds right?

    what did I do wrong?
     

    Attached Files:

  2. jcsd
  3. Sep 20, 2007 #2

    learningphysics

    User Avatar
    Homework Helper

    everything is right except your final answer... 22/23.7 isn't 0.96.
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook