Physics · Class 11 · Chapter 9
Mechanical Properties of Fluids
12 lessons121 min8 simulations10 practice questions
Liquids and gases flow, so a single set of ideas covers both. This chapter starts with fluids at rest (pressure, Pascal's law, pressure growing with depth, barometers and manometers, hydraulic machines), moves to fluids in motion (streamlines, the equation of continuity, Bernoulli's principle, Torricelli's law, dynamic lift), then to the friction inside real fluids (viscosity, Stokes' law, terminal velocity) and ends at the surface of a liquid (surface tension, angle of contact, excess pressure in drops and bubbles, capillary rise).
Also called: fluid mechanics · Bernoulli's theorem · viscosity · surface tension
Lessons
12 lessons · 121 min
01Fluids and pressureNCERT §9.1, §9.27 min02Pascal's law and pressure with depthNCERT §9.2.1, §9.2.210 min1 sim03Atmospheric and gauge pressureNCERT §9.2.310 min1 sim04Hydraulic machinesNCERT §9.2.411 min1 sim05Streamline flow and continuityNCERT §9.37 min06Bernoulli's principleNCERT §9.4, §9.4.113 min2 sims07Dynamic liftNCERT §9.4.26 min08Viscosity and Stokes' lawNCERT §9.5, §9.5.111 min1 sim09Surface energy and surface tensionNCERT §9.6, §9.6.1, §9.6.27 min10Angle of contact, drops and bubblesNCERT §9.6.3, §9.6.410 min1 sim11Capillary riseNCERT §9.6.510 min1 sim12Chapter reviewMust-know facts, traps and formulas19 min
Simulations
8 in this chapter
Pressure depends only on depthIn: Pascal's law and pressure with depthU-tube with two liquidsIn: Atmospheric and gauge pressureHydraulic lift: a small push, a large forceIn: Hydraulic machinesVenturi tube: speed up, pressure downIn: Bernoulli's principleTorricelli's jet: which hole squirts farthest?In: Bernoulli's principleTerminal velocity: when the forces balanceIn: Viscosity and Stokes' lawDrops and bubbles: why the small one pushes harderIn: Angle of contact, drops and bubblesCapillary riseIn: Capillary rise