Water is flowing through a horizontal pipe of non-uniform cross-section. At the extreme narrow portion of the pipe, the water will have:
Correct answer: A. Maximum speed and least pressure
- A. Maximum speed and least pressure
- B. Maximum pressure and least speed
- C. Both pressure and speed maximum
- D. Both pressure and speed least
Explanation
By continuity, narrow section → higher speed; Bernoulli's principle then implies higher kinetic energy corresponds to lower static pressure. Thus speed is max and pressure is minimum at the constriction.
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About Fluid Dynamics
Fluid flow is described through speed, pressure and density, including steady flow and the equation of continuity for conserving mass. Bernoulli's equation relates pressure, speed and height, while fluid drag and terminal velocity explain why a falling object eventually moves at constant speed when drag balances its weight.
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