Question

How viscosity is different from the friction?

Answer 1

Friction and viscosity refer to forces that oppose the motion.

Main difference

• friction is used to refer to forces that resist relative motion, in general,whereasviscosity refers specifically to resistive forces that occur between layers of a fluid when fluids attempt to flow. Therefore, the term “friction” can also refer to resistive forces between solid surfaces, or the resistive forces between solid and fluid surfaces.
• Viscous force depends on the velocity gradient and area of contact and frictional force independent of area of contact and relative velocity.
• Viscosity of liquid decrease with increase in temperature, Where as friction independent of temperature.