Taken from a physics magazine..(adsbygoogle = window.adsbygoogle || []).push({});

A Child in a boat needs to cross the river. The speed of the current in the river isktimes greater than the speed of the boat in still water. If a child crosses the river in such a way as to minimize the lateral displacement it takes time T to cross. What is the minimun time required to cross the river.

So far with use of vector diagrams i came up with the pythag arrangement to find Tm(min)

Just an idea :)

[edit]tested and wrong :<[/edit]

Open for suggestions

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# Homework Help: Another lengthy mechanics questioN!

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