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Vector Calculus to derive Newton's second law

  1. Feb 17, 2015 #1
    THIS THREAD HAS BEEN MOVED FROM ANOTHER FORUM BECAUSE IT IS HOMEWORK. BUT THERE IS NO TEMPLATE.

    Hi everyone,
    The problem gives that a particle moves in a circle with angular velocity ω. I know that r×ω=v, which is the velocity of the particle. However, I am told to differentiate and find τ=Iα but, using the product rule, I found a=(v×ω)+(r×α). I am not sure where to go from here as these quantities don't seem familiar to me. Was there a step I missed or is there something I am missing in this step?
    Thanks so much for any help.
     
    Last edited by a moderator: Feb 17, 2015
  2. jcsd
  3. Feb 18, 2015 #2

    jedishrfu

    Staff: Mentor

    Do you see any vectors that are parallel to one another?

    Also this looks like a homework problem and so you should edit your post to use the homework template otherwise someone will delete it and warn you.
     
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