NEET2019Physics-Relative Motion
NEET 2019 Physics Riverboat Problems MCQ Question
Type: MCQ-numerical-Medium-Class 11
The speed of 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:
A
60° west
B
45° west
C
30° west
D
0°
Correct Answer
Option C
Detailed Explanation
To cross the river in the shortest path, the swimmer must aim upstream at an angle where the resultant velocity is perpendicular to the river flow.
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