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!

Homework Help: Am I using the Right Formula?

  1. May 7, 2016 #1
    1. The problem statement, all variables and given/known data

    2. Relevant equations
    I want to say I should be using this one:
    aA = aB + α x rA/B + ω x (ω x rA/B)

    3. The attempt at a solution
    The only problem is that if I'm supposed to find the angular acceleration then i'd have to take the... inverse of the cross product? To get it back and I don't think that that's possible. I also want to say that it's zero because OQ moves with constant angular velocity, but I believe that that would result in PQ moving with acceleration because theta would be changing?
  2. jcsd
  3. May 7, 2016 #2


    User Avatar
    Science Advisor
    Homework Helper
    Gold Member

    I don't think that equation will help.
    Just use a bit of geometry to find the angle of the bar PQ as a function of theta.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted