NEET 2019 Physics 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 :
Answer: (1)
Solution
To cross along the shortest path (straight north), the resultant velocity must point due north. So the swimmer must cancel the eastward drift of the river by swimming with a westward component: , where is measured
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