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!

Not calc based! tangential and angular acceleration

  1. Nov 3, 2011 #1

    darlagatsch

    User Avatar

    1. The problem statement, all variables and given/known data
    a disk rotates with constant angular accel. the initial angular speed of the disc is 2pie rad/s. After the disk rotates through 10pie rad, the ang speed is 7pie rad/s.

    2. Relevant equations
    a. what is the mag of the angular accel?


    3. The attempt at a solution
    alpha=delta omega/delta time
    omega=delta theta/delta time
    etiher or both?
     
    darlagatsch, Nov 3, 2011
  2. jcsd
    Phys.org - latest science and technology news stories on Phys.org
  3. Nov 3, 2011 #2

    PhanthomJay

    User Avatar
    Science Advisor
    Homework Helper
    Gold Member

    the first one has 2 unknowns and the second one is wrong...why not try one of the other kinematic equations for constant angular acceleration.....the one that relates omega with alpha and theta?
     
    PhanthomJay, Nov 3, 2011
  4. Nov 3, 2011 #3

    darlagatsch

    User Avatar

    i have no idea! HELLLP
     
    darlagatsch, Nov 3, 2011
  5. Nov 3, 2011 #4

    PhanthomJay

    User Avatar
    Science Advisor
    Homework Helper
    Gold Member

    Well you seem to have known somehow that alpha=delta omega/delta time, how did you know that? You can find the equations on the link below, 4th slide:

    http://www.colorado.edu/physics/phys2010/phys2010_fa11/LectureNotes/phys2010_fa11_lecture28.pdf [Broken]

    You should first learn, understand, and memorize the motion equations for translational motion.
     
    Last edited by a moderator: May 5, 2017
    PhanthomJay, Nov 3, 2011
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Not calc based! tangential and angular acceleration

  1. Angular acceleration/tangential velocity (Replies: 1)

  2. Angular Velo, Tangential Acceleration (Replies: 3)

  3. Tangential and angular velocity and acceleration (Replies: 1)

  4. Angular and tangential acceleration (Replies: 4)

  5. Tangential acceleration given radius and angular acceleration (Replies: 1)

Loading...