You stand on the west bank of a 60 m wide river flowing north at 4 m / s . Your swimming speed relative to the water is 5 m / s . The path relative to the earth that lets you cross the river in the sh

Question

You stand on the west bank of a 60 m wide river flowing north at 4 m / s . Your swimming speed relative to the water is 5 m / s . The path relative to the earth that lets you cross the river in the shortest time is:

TestHub · Accepted Answer

The crossing time is component of swimming velocity across the river width ​ , which is smallest when the whole swimming velocity points across the river (due east relative to the water). The current then adds a northward drift, so relative to the earth the path is a straight line inclined downstream. Option B.

Physics - Kinematics Question with Solution | TestHub

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