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Help me to figure out how this equation is derived

  1. Dec 9, 2008 #1
    Hello, I just couldn't understand how solver comes up with the equation at line 5 of the part b. (equates t (time) to other variables). I think the first 4 lines are enough to figure out this equation so i am not posting the question. i will be grateful if you'd help me.http://www.cramster.com/Answer-Board/Image/200863929416334808218196100003057.jpg
    Last edited by a moderator: Apr 24, 2017
  2. jcsd
  3. Dec 9, 2008 #2


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    Science Advisor

    He uses [tex]R\omega=at[/tex] (line 3) in line 2, and solves for t.
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