Question

In a streamline flow,
(a) the speed of a particle always remains same
(b) the velocity of a particle always remains same
(c) the kinetic energies of all the particles arriving at agiven point are the same
(d) the momenta of all the particles arriving at a given point are the same.

Answer 1

(c) the kinetic energies of all the particles arriving at a given point are the same 
(d) the momenta of all the particles arriving at a given point are the same.

EXPLANATION:  

The speed and the velocity of a particle in a streamline flow may change as it moves ahead so (a) and (b) are not true.         

 All the particles arriving at a point in a streamline flow have the same velocity. Hence all the particles arriving at that point will have the same kinetic energy and the same momentum. Options (c) and (d) are true.