📖 Quick Formula Recap for NEB Class 11 Physics (2083)

🔹 Mechanics: Equations of motion: v = u + at, s = ut + ½at², v² = u² + 2as. Newton's second law: F = ma. Work-Energy theorem: W = ΔKE. Conservation of momentum: m₁u₁ + m₂u₂ = m₁v₁ + m₂v₂.

🔹 Gravitation: Newton's law: F = Gm₁m₂/r². Acceleration due to gravity: g = GM/R². Escape velocity: vₑ = √(2GM/R) = √(2gR) ≈ 11.2 km/s. Orbital velocity: vₒ = √(GM/(R+h)).

🔹 Rotational Dynamics: Moment of inertia for rod (center): I = ML²/12; (end): I = ML²/3. Torque: τ = Iα. Angular momentum: L = Iω. Conservation of angular momentum: I₁ω₁ = I₂ω₂.

🔹 Periodic Motion: Time period of simple pendulum: T = 2π√(L/g). Spring-mass system: T = 2π√(m/k). Energy in SHM: E = ½kA² = constant.

🔹 Fluid Mechanics: Surface tension: T = F/L, capillary rise: h = 2Tcosθ/(rρg). Viscosity: Stokes' law: F = 6πηrv, terminal velocity: vₜ = 2r²(ρ-σ)g/(9η). Bernoulli's equation: P + ½ρv² + ρgh = constant.

🔹 Thermodynamics: Ideal gas equation: PV = nRT. First law: ΔQ = ΔU + ΔW. Adiabatic process: PV^γ = constant. Carnot efficiency: η = 1 - T₂/T₁.

🔹 Optics: Mirror formula: 1/f = 1/u + 1/v. Lens maker formula: 1/f = (μ-1)(1/R₁ - 1/R₂). Magnification: m = -v/u. Prism formula: μ = sin((A+δ_m)/2) / sin(A/2).

🔹 Electrostatics: Coulomb's law: F = kq₁q₂/r². Electric field: E = F/q. Gauss law: Φ = q/ε₀. Capacitance of parallel plate: C = ε₀A/d. Energy stored: U = ½CV² = ½Q²/C.