1. Limited time only! Sign up for a free 30min personal 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!

Homework Help: A boat travels down stream, then travels up stream

  1. Sep 7, 2015 #1
    1. The problem statement, all variables and given/known data
    What is the time needed to complete a trip if v = V.

    2. Relevant equations

    3. The attempt at a solution
    I drew a diagram and tried plugging values in.

    Attached Files:

  2. jcsd
  3. Sep 7, 2015 #2


    User Avatar
    Science Advisor

    Think about what this means.

    Will a boat travel upstream if it's velocity is equal to that of the downstream water?
    Have you ever walked on a treadmill? What speed must you walk at to stay on the treadmill?

    And what was the result?
  4. Sep 7, 2015 #3
    Terrible diagram but why don't you attempt am answer?
  5. Sep 7, 2015 #4


    User Avatar
    Gold Member

    That's not a helpful description of your calculations. Be more specific
  6. Sep 7, 2015 #5
    So the velocity of the boat has to be greater than the velocity of the current when rowing back. I made a force diagram with vectors. I always have problems with problems that don't give numbers... so would v<V?
    Last edited: Sep 7, 2015
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted