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Ch-10, MECHANICAL PROPERTIES OF FWIDS., * Fluid, A fluid is a substance that cam flow. Both liquids and Gases, are fluids., Impostant chadacteristics of fluids -, (i) The moloculs in a fluid are gmanged in a Yandom manneY., cii) A fleuid has no definite shape of it's own., FAS), In this chapter we have to study 2mots :-, I. HYDROSTATICS - The boanch of physics that deals with the study of, fluids at rest is called hyphrostatics.( eouyanay, Sunfoce Tension), I, HYDRODYNAMICS- The branch of physics that deal with the study, of fluids in motion is alled hydrodynamics., (Equntion of Continuity , Berroulli's Theorem, Toricelli's Theorem, viscosity,), # Thrust of a liquid (force), The total force exested by a liquid on any suotace in ontact, is called thrust. This force acts perpendicular to the suroface., FAQ., 1. SI unit of thoust is Newton (N)., 2. Dimensional formula is [MLT]., 3. It is a vector quantity, to suroface., direction of which is perpendiaular

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# Hydralic PresSUre (Pressuse), The pressuse at a point on a surface is thrust Cforce) acting, per unit aoea around that point., P = force, Avea, 1. SI unit of Pressure is Nm?., 2. Dimensional fomula is given by [ML"T²]., 3. Pressude is a salao quantity., #* Density (P), The density of, amy, material is defined as it's mass per unit, Voleme., Moss, Volume, FAO., 1. SI unit of dersity is given by kgm, 2. Dimensional formula is given by [MLST ]., * Relative Density or Specific grauity., It is defined as ratio of the density of a substance to the, density of wateð at 4°C., RD ., Density of substance, Oensity of wate at 4°C, 4. It is unitless & climensionless., 2. 'p' of wateo is 1000 kg m²