Physics — Revision Checklist
All 14 Physics chapters broken into checkable revision items, prioritised by TGBIE exam weight. Tick off as you revise.
Ch. 3 & 4 Motion (Mechanics) — High Weight
High- Derive and memorise all 3 kinematic equations; know which to use for each problem type
- Projectile: derive R = u²sin2θ/g and H = u²sin²θ/(2g); θ = 45° for maximum range
- Relative velocity: v_AB = v_A − v_B; draw vector diagrams for crossing river problems
- Uniform circular motion: centripetal acceleration a = v²/r = ω²r; centripetal force = mv²/r
Ch. 5 Laws of Motion — High Weight
High- Newton's 3 laws — state precisely; 3rd law: action-reaction on different bodies
- Friction: static (maximum = μₛN), kinetic (μₖN); μₖ < μₛ always
- Angle of banking: tanθ = v²/(rg) — derive and apply to problems
- Free body diagram: draw for every problem involving Newton's 2nd law
Ch. 7 Rotational Motion — High Weight (LAQ)
High- Parallel axis theorem: I = I_cm + Md² — derive and apply
- Perpendicular axis theorem: I_z = I_x + I_y — for laminar bodies only
- Moment of inertia values: rod ML²/12 (centre), ML²/3 (end); disc MR²/2; sphere 2MR²/5
- Rolling without slipping: KE = ½mv²(1 + I/(mR²)); know ratio for sphere (7/10 mv²) and cylinder (3/4 mv²)
- Angular momentum L = Iω; τ = Iα; conservation when τ_ext = 0
Ch. 9 Gravitation — High Weight (LAQ)
High- Kepler's 3 laws — state all three; derive T² ∝ r³ from F = GMm/r² and circular orbit
- Orbital velocity: v_o = √(GM/r); escape velocity: v_e = √(2gR) ≈ 11.2 km/s
- g with altitude: g_h = g(1−2h/R); with depth: g_d = g(1−d/R)
- Geostationary satellite: T = 24 h; r ≈ 42,000 km; explain uses
Ch. 13 Thermodynamics — High Weight (LAQ)
High- 1st law: ΔU = Q − W; for isothermal ΔU = 0; for adiabatic Q = 0
- Carnot engine: derive η = 1 − T₂/T₁; this is maximum possible efficiency
- Types of processes: isothermal (T constant), isobaric (P constant), isochoric (V constant), adiabatic (Q = 0)
- 2nd law: Kelvin statement and Clausius statement — know both
Ch. 8 Oscillations — Medium Weight
Medium- SHM definition: a = −ω²x; restoring force proportional to displacement
- Velocity in SHM: v = ω√(A²−x²); maximum at x=0, zero at x=±A
- T = 2π√(L/g) for pendulum; T = 2π√(m/k) for spring
- Energy in SHM: total E = ½kA² = ½mω²A² (constant)
Ch. 6, 10, 11, 12, 14 — Medium Weight
Medium- Work-energy theorem: W_net = ΔKE; elastic collision velocities
- Stress, strain, Young's modulus — definitions and relationships
- Bernoulli's principle and applications: Venturimeter, atomiser
- Newton's law of cooling, Stefan-Boltzmann law of radiation
- Kinetic theory: v_rms = √(3kT/m); mean free path λ = kT/(√2πd²P)