Concepts Of Physics MCQ Edition [Volume 1]PhysicsFluid Mechanics
For a streamline flow,
Options
- Athe velocity of a particle always remains constant
- Bthe speed of a particle always remains constant
- Cthe kinetic energies of all particles arriving at a specific point are identical
- Dthe momenta of all particles arriving at a specific point are identical
Correct answer
D. the momenta of all particles arriving at a specific point are identical
Step-by-step solution
In a streamline flow, the velocity of the fluid at any fixed point in space remains constant with time. As a fluid particle moves from one point to another along a streamline, its velocity and speed can change depending on the cross-sectional area of the tube of flow, in accordance with the equation of continuity ( A₁ v₁ = A₂ v₂ ). Thus, the velocity and speed of a given particle do not necessarily remain constant. Since the velocity at any specific point is constant, all fluid particles arriving at that point will