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How long will it take the rabbit to come to a momentary complete stop

  1. Sep 16, 2009 #1
    1. The problem statement, all variables and given/known data

    Using the equations from question 1 determine how long it will take the rabbit to come to a complete momentary stop.

    2. Relevant equations

    X= 30cm + (-40 cm/s)t + (24 cm/s^2)t^2

    V= (-40cm/s) + (12 cm/s^2)t

    V^2= (-40 cm/2)^2 + 2(12 cm/s^2)[X-30cm]

    3. The attempt at a solution

    I have attempted to work this using the middle equation and come up with an answer of 3.33 seconds for the rabbit to stop. However, the entire length of travel of the rabbit is 3.4 sec. Need help finding what I am missing. thanks
     
  2. jcsd
  3. Sep 16, 2009 #2
    Can you give some more details about what the first question was? Like numbers and stuff
     
  4. Sep 16, 2009 #3
    The answer you have is correct. But what do you mean by "the entire length of travel"?
     
  5. Sep 16, 2009 #4
    The entire graph spans from 0 to around 3.4 seconds of travel time.
     
  6. Sep 16, 2009 #5
    Hmm, weird. But it is a difference of 0,07. Are you sure it's significant?
     
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