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Homework Help: Calculate the avg speed phyics help

  1. Sep 26, 2010 #1
    "Calculate the avg speed" phyics help

    1. The problem statement, all variables and given/known data

    A caiman swims 190 meters at a speed of 6 m/s. It then enters a stream and slows to 4 m/s for 340 meters. What is the average speed of the crocodile?
    10 minutes ago - 4 days left to answer.


    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Sep 26, 2010 #2
    Re: "Calculate the avg speed" phyics help

    You have two distance and speed sets from which you can get times. Add the times and add the distances, now you have a new r = D/t.
     
  4. Sep 26, 2010 #3
    Re: "Calculate the avg speed" phyics help

    I did that. I added 190m and 340m and I got 530m as the total distance. I did the v=d/t formula on both distances and i got the times as 85 s and 31.66 s. I then divided 530m.116.66 s and i got 4.54 m/s but that is incorrect.
     
  5. Sep 27, 2010 #4
    Re: "Calculate the avg speed" phyics help

    Your numbers appear correct.
     
  6. Oct 1, 2010 #5
    Re: "Calculate the avg speed" phyics help

    Thanks, you were right all along!
     
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