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At what angle to the stream should a swi...

At what angle to the stream should a swimmer swim to reach the opposite bank as soon as possible?

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Verified by Experts

The correct Answer is:
`alpha=pi//2`
The speed of the swimmer in the direction of the y-axis is a maximum, if the swims perpendicularly to the stream. This obvious, if we use a feference frame fixed relative to water.
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