1. Not finding help here? Sign up for a free 30min 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!

Average current speed

  1. Jun 29, 2008 #1
    Ocean currents (miles/hr) at a certain location are given below

    Time of day: Speed mph:
    8:00 am 17
    8:10 am 20
    8:20 am 22
    8:30 am 21
    8:40 am 17

    How can I estimate the average river current speed from 8:00 am to 8:40 am using the trapezoidal rule? I tried but I got a huge number.
  2. jcsd
  3. Jun 30, 2008 #2


    User Avatar
    Homework Helper

    What exactly did you do? Did you draw out the speed-time graph of these points and then attempt to find the area underneath after connecting all the dots?
  4. Jun 30, 2008 #3
    I converted 8:40 into hours so 40/60=2/3
    Then I supposed 0 to be 8:00, so the equation I had was integral sign 0 to 2/3 S(t) dt.
    Then using the data in the chart: (17+2(20)+2(22)+2(21)+17)
    Then I multiplied that sum by 1/(b-a) to get the average, and I got a number in the hundreds.
    Last edited: Jun 30, 2008
  5. Jun 30, 2008 #4
    nvm i got it
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?

Similar Discussions: Average current speed
  1. Average speed (Replies: 6)

  2. Average value (Replies: 16)

  3. Average Value (Replies: 5)

  4. Average Velocity (Replies: 1)