Question

A swimmer wants to reach to a point just opposite on the bank of river. How should he swim and why?

Answer 1

Question #61913, Physics / Mechanics | Relativity

A swimmer wants to reach to a point just opposite on the bank of river. How should he swim and why?

Solution

The swimmer's velocity relatively to the water should be directed at the angle $\alpha$ , so that its component along the water flow will be cancelled out by the water flow velocity. The angle can be determined as:

$$\alpha = \arcsin \left(\frac {v _ {flow}}{v _ {relative}}\right)$$

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