Mechanical Properties of Fluids Class 11 Physics Notes – Formulas & Quick Revision

Fluids mein pressure, Pascal law, Bernoulli theorem, viscosity aur surface tension aate hain — NEET ka favourite chapter. Yahan aapko is chapter ke sabse important formulas aur quick revision points free milte hain — NCERT/CBSE syllabus ke hisaab se, boards aur JEE/NEET dono ke liye.

Important Formulas & Concepts — Mechanical Properties of Fluids

• Pressure at depth: P = P₀ + ρgh
• Pascal law → hydraulic lift: F₂ = F₁(A₂/A₁)
• Archimedes: Buoyant force = ρ_liquid × V_displaced × g
• Equation of continuity: A₁v₁ = A₂v₂
• Bernoulli: P + ½ρv² + ρgh = constant
• Torricelli: efflux velocity v = √(2gh)
• Stokes law: F = 6πηrv; terminal velocity v_t = 2r²(ρ−σ)g/9η
• Capillary rise h = 2T·cosθ/(rρg); excess pressure: drop 2T/r, bubble 4T/r

Quick Revision Points

• Bernoulli applications rato: airplane lift, atomizer, roof udna
• Terminal velocity r² par depend karti hai
• Water-glass angle acute (rise), mercury-glass obtuse (depression)
• Drop 2T/r vs bubble 4T/r — confusion mat karo
• Viscosity: temperature badhne par liquids mein ghatti hai, gases mein badhti hai

FAQ

NEET ke liye kitna important?

Bahut — surface tension, viscosity aur Bernoulli se regular questions aate hain.

Formulas bahut hain, yaad kaise karun?

Complete PDF ka colour-coded formula sheet ek page par sab organize kar deta hai.

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