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Finding the minimum time for crossing a river

  • #1

Homework Statement



Finding the minimum time for crossing a river[/B]

how is the minimum time crossed by distance between the banks/velocity of swimmer with respect to ground as mentioned in the video?

Homework Equations




The Attempt at a Solution


The minimum time is only possible when velocity of man with respect to ground is at angle to the current flow so that he moves perpendicular to the river flow
 

Answers and Replies

  • #2
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The first thing to do in a problem like this is to write down an equation for the time as a function of the angle. Can you do that?
 

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