Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: AP Free - Response Question HELP iNCLUDES angular velocity and acceleration

  1. Mar 5, 2007 #1
    AP Free - Response Question HELP!!!! iNCLUDES angular velocity and acceleration

    http://www.fayar.net/east/Teacher.web/Math/young/APPC/APPC%201999/physics_c_m_99.pdf [Broken]

    Mechanics 3 is the problem I really need help on.
    I tried to find the tension of the string by setting it equal to mg + Iwr, but I'm not sure if I'm doing it right! On part b, I set the angular acceleration equal to the initial angular velocity + moment of inertia, and I got through canceling some factors. On part c, I set the angular velocity equal to the linear velocity times the time.

    I NEED HELP ON HOW TO DO IT RIGHT! I THINK I'M TOTALLY DOING IT WRONG BECAUSE MY ANSWERS SEEM TO BE WAY OFF!
     
    Last edited by a moderator: May 2, 2017
  2. jcsd
  3. Mar 5, 2007 #2
    Its a string, so it can only support load in the axial direction.
     
  4. Mar 6, 2007 #3
    Is current used up in a resistor? Explain
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook