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    yhzhang's Avatar
    yhzhang Posts: 17, Reputation: 1
    New Member
    		  
    #1

    Sep 17, 2012, 08:20 AM
    A river is to be crossed by a boy using a row boat.
    Select an answer for each... below.
    1. For an observer on shore, the speed of the boat for F is... for D
    2. Time to row across for C is... for J
    3. Time to row across for K is... for B
    4. The distance traveled in crossing for J is... for B
    5. Time to row across for J is... for B

    The filling answer options are equal to, larger than, and less than.
    The picture is below:
    http://www.chegg.com/homework-help/questions-and-answers/assume-water-uniform-velocity-represented-vector-labeled-f-rowing-speed-boy-set-possible-o-q2563729?frbt=1
    Curlyben's Avatar
    Curlyben Posts: 18,514, Reputation: 1860
    BossMan
    		  
    #2

    Sep 17, 2012, 08:23 AM
    While we are happy to HELP, we will not do the work for you.
    Please show us what you have done and where you are having an issue.
    yhzhang's Avatar
    yhzhang Posts: 17, Reputation: 1
    New Member
    		  
    #3

    Sep 17, 2012, 08:26 AM
    I don't know how to do this problem that's why I am asking for help, if you can show the procedure of each steps that would be great.
    ebaines's Avatar
    ebaines Posts: 12,131, Reputation: 1307
    Expert
    		  
    #4

    Sep 18, 2012, 05:55 AM
    For each of these start by adding the vector F (the river's velocity vectyor) to each of the row boat vectors - this gives you the actual velocity of the boat relative to the shore. Then you can answeer questions such as which route is fastest across by seeing which one has the largest horizontal component.
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http://educog.com/adm/randomlabel.png?token=1255567995_17167_1 Select an answer for each... below. Time to row across for H is... for K. The distance traveled in crossing for K is... for H. Time to row across for K is... for J. Time to row across for A is... for H. For an observer on shore,...

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