1. Limited time only! Sign up for a free 30min personal 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!

Number of revolutions a disk has made after a given time

  1. Mar 8, 2010 #1
    1. A computer hard disk starts from rest, then speeds up with angular acceleration of 218 rad/s^2 until it reaches its final angular speed of 6660rpm. How many revolutions has the disk made 10.1s after it starts up?



    3. The attempt at a solution.
    I have no idea how to find the number of revolutions in the time given with what appers to be a changing acceleration rate. I am unsure what is going on or how to solve this problem. Please help!
     
  2. jcsd
  3. Mar 8, 2010 #2


    this is a constant angular acceleration problem. does that help? It has that constant acceleration until it reaches that speed, and after that, the acceleration equals zero.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Number of revolutions a disk has made after a given time
  1. Number of revolutions (Replies: 3)

Loading...