Viscosity Flashcards
1
Q
Define Viscosity
A
Viscosity is a measure of a fluid’s resistance to flow
2
Q
Viscosity Formula
A
Viscous Force (F) = -n A (dv/dx)
where,
dv/dx -> Rate of change of velocity with distance
A -> Area of cross section
n -> Coefficient of Viscosity
3
Q
What is stoke’s law
A
Stokes’ law describes the force of viscosity on a spherical object moving through a fluid
4
Q
Stoke’s Law Formula
A
F = 6 X pi X n X r X v
where,
n = fluid viscosity
r = sphere radius
v = sphere velocity
5
Q
What is terminal velocity
A
It is the maximum speed an object can reach when falling through a fluid, such as air or water
6
Q
Terminal Velocity Formula
A
v = 2r^2 (p - P)
———————
9n
where,
p = object density
P = fluid density
r = radius or area of object
n = viscosity of liquid
