Question

Along a streamline flow of fluid, 

(a) the velocity of all fluid particles at a given instant is constant 

(b) the speed of a fluid particle remains constant 

(c) the velocity of all fluid particles crossing a given position is constant

(d) the velocity of a fluid particle remains constant

Answer 1

(c) the velocity of all fluid particles crossing a given position is constant

If every particle that passes through a particular point, moves along exactly the same smooth path followed by previous particles passing that point.

This path is called streamline flow. In this flow, the velocity of all fluid particles crossing a given position is constant.