A river is to be crossed by a boy using a row boat Assume that the water has uni

Question

A river is to be crossed by a boy using a row boat

Assume that the water has uniform velocity, represented above by the vector labeled B. The rowing speed of the boy and a set of possible orientation of his boat are also shown. Select the direction (i.e., C, or D, or ...) in order to cross the river in the shortest time. (Notice that the number of tries is reduced.)

For which rowing orientation will the boy land on the opposite shore directly across from his starting position, neither upstream or downstream. (Notice that the number of tries is reduced.)

Select an answer for each .... below. (Greater than, less than, or equal to)

Explanation / Answer

(a) In order to cross the river in the shortest time, the boy must follow direction H

(b) The orientation D will land the boy on the opposite shore directly across from his starting position, neither upstream or downstream.

Select an answer for each .... below. (Greater than, less than, or equal to)

(1) greater than

(2) less than

(3) less than

(4) greater than

(5) less than

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