Q. The relative velocity of two parallel layers of water is $8\ cms^{- 1}$. If the perpendicular distance between the layers is 0.1 cm, then velocity gradient will be
A) $40\ s^{- 1}$
B) $50\ s^{- 1}$
C) $60\ s^{- 1}$
D) $80\ s^{- 1}$
Explanation
(d) The velocity gradient
$= \frac{\Delta V}{\Delta r} = \frac{8}{0.1} = 80s^{- 1}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.