1. PF Contest - Win "Conquering the Physics GRE" book! Click Here to Enter
    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!

Angular acceleration of a bar on a hinge

  1. Jun 13, 2010 #1
    1. The problem statement, all variables and given/known data
    A bar on a hinge starts from rest and rotates with [tex]\alpha[/tex]=(10+6t) rad/s2 t is in seconds. Determine the angle in radians the bar turns in the first 4 seconds.

    2. Relevant equations
    I'm a little stumped how to get this one started. I assume i need to get it from angular acceleration to angular displacement, but I'm not exactly sure how to do that. So do I have to integrate it with respect to time twice?

    3. The attempt at a solution
  2. jcsd
  3. Jun 13, 2010 #2
    That's right. Remember to use constants of integration/ boundary conditions in general (although it should make no difference in this case).
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook