Viscosity: The Frictional Force in Fluids

No. Date Physics "Viscosity". The property of a fluid by Virtue of which an internal Frictional Force act befween its different layers Which opposes that Relative motion. These internal Frictional Force wcalled Viscous Fore Vis cous force are interMdecular Forces acting between the Molecules of different layer of liquot Moving with different Velocity. Viscous Face (F)= Adv dx n= f where, dv dx = rate of change of Velocity A( dv With distance Called Velocity dx Gordent . where A= Area of cross Section and n= = Cofficient of Viscocity SI Units of 7 is NSM or pascal-second or decapoise It demensional formula.

No. Date Viscocity is due transport Momentum the Value of Viscounty for Ideal liquid is Zero Variation of Viscocity The Viscocity of liqued decreases With increase in temperature Nt . no 1 tat + BE Where, no and he are Coepicient of Uis cosities at 0°C and E°C a and B are constant. The Vucocity of gaes Increases with IncRease intemperature as noo T o The Viscocity of liquods Increases With increases In preasure