SIMILARITIES AND DIFFERENCES BETWEEN FRICTION AND VISCOSITY

Similarities:

• Both came in to play when ever there is relative motion.
• Both opposes relative motion.
• Both erase from intermolecular force.
• Both depend on the nature of surface.

Difference:

• 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.
• In friction heat is generated at the surface between the solids. When a fluid moves over a solid heat is generated within the fluid.