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a battlion of soldiers is ordered to swim across a river 500ft. at what minimum rate should they swim perpendicularly to river flow in order to avoid being washed away by the waterfall 300ft downstream. the speed of current is 3mph

a battlion of soldiers is ordered to swim across a river 500ft. at what minimum rate should they swim perpendicularly to  river flow in order to avoid being washed away by the waterfall 300ft downstream. the speed of current is 3mph

Grade:

1 Answers

Sher Mohammad IIT Delhi
askIITians Faculty 174 Points
6 years ago
since we want a drift less than 300ft,  3mph =3*1.6 kmph
                                           4.8 kmph *t= 300*.3/1000= .09
                                                          t=.09/4.8 hours
so vertical velocity is                        v= 500*.3*4.8/1000*.09
 

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