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In a streamline flow:

Correct answer: C. The kinetic energies of all the particles arriving at a given point are the same

  • A. The speed of a particle always remains the same along its streamline
  • B. The velocity of a particle always remains constant throughout the flow
  • C. The kinetic energies of all the particles arriving at a given point are the same
  • D. The moments of all the particles arriving at a given point are the same

Explanation

In steady flow the velocity field at each point is fixed in time; thus any particle passing through a particular point experiences the same instantaneous speed there - so particles arriving at a given point share the same kinetic energy. It is not true that a particle's speed always remains constant along its streamline.

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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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