1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    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!

The Equations of Rotational Kinematics

  1. Oct 13, 2008 #1
    1. A spinning wheel on a fireworks display is initially rotating in a counterclockwise direction. The wheel has an angular acceleration of -4.00rad/s2. Because of this acceleration, the angular velocity of the wheel changes from its initial value to a final value of -25.0rad/s. While this change occurs, the angular displacement of the wheel is zero. Find the time required for the change in the angular velocity to occur.

    2. W=Wo+xt

    3. The answer is suppose to be 12.5s..
    OK the initial velocity is what I don't have, i know that its going to be negative.. In order for me to get the Initial angular velocity, i need the Time, which I also don't have.. I don't know how to answer with two unknowns.
  2. jcsd
  3. Oct 13, 2008 #2
    hello lol
  4. Oct 14, 2008 #3
    bump bump bump
  5. Oct 14, 2008 #4
    bumping again for the 2nd day :)
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?

Similar Discussions: The Equations of Rotational Kinematics
  1. Rotational Kinematics (Replies: 2)