Physics
Fluid-Mechanics
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A horizontal stream of water leaves an opening in the side of a tank. If the opening is y metres above the ground, and the stream hits the ground x metres away. If g is acceleration due to gravity, the speed of water as it leaves the tank in terms of g, y and x is

  1. x square root of fraction numerator g over denominator 2 y end fraction end root
  2. x square root of fraction numerator 2 y over denominator g end fraction end root
  3. y square root of fraction numerator 2 y over denominator g end fraction end root
  4. y square root of fraction numerator 2 x over denominator g end fraction end root

The correct answer is: x square root of fraction numerator g over denominator 2 y end fraction end root


    x equals u cross times square root of fraction numerator 2 y over denominator g end fraction end root text  or  end text u equals x square root of fraction numerator g over denominator 2 y end fraction end rootRange

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