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!

Determine the rotation period of a disc with 2m radio , that

  1. Sep 28, 2015 #1
    1. The problem statement, all variables and given/known data
    Determine the rotation period of a disc with 2m radio , that makes 20 rotations per minute.

    2. Relevant equations


    3. The attempt at a solution
    I did T= 60/20 to find the period , but is that it ? what about the 2m?
     
  2. jcsd
  3. Sep 28, 2015 #2
    Rotation period is the time taken for one complete rotation. You already know the time taken for 20 rotations( 1 min) , so it doesn't matter what radius it has , simply calculate time taken for one complete rotation.The answer is correct (60/20 = 3 seconds)
     
  4. Oct 3, 2015 #3
    thank you !
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted



Similar Discussions: Determine the rotation period of a disc with 2m radio , that
  1. Rotating Discs (Replies: 5)

  2. Rotation of a disc (Replies: 3)

Loading...