STANDARD Physics Riverboat Problems MCQ Question
The speed of a swimmer in still water is 20 m/s. The speed of river water is 10 m/s and is flowing due east. If he is standing on the south bank and wishes to cross the river along the shortest path, the angle at which he should make his strokes w.r.t. north is, given by
45° west
30° west
0°
60° west
Correct Answer
Detailed Explanation
To cross the river in the shortest path, the swimmer should aim at an angle where the resultant velocity is perpendicular to the river flow. Using trigonometry, the angle is calculated as 30° west.
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