Download IB physics formula sheet and more Cheat Sheet Physics in PDF only on Docsity! IB Physics Formula Sheet (from the Physics Data Booklet) _____________________________________________________________________________________ Topic 1: Measurement and uncertainties 1.1. Measurements in physics 1.3.Vectors and scalars AH = A cosθ 1.2. Uncertainties and errors AV = A sinθ If y = a ± b then ∆y = ∆a + ∆b If y = ab/c then ∆y/y = ∆a/a + ∆b/b + ∆c/c If y = an then ∆y/y = |n ∆a/a| _____________________________________________________________________________________ Topic 2: Mechanics 2.1. Motion 2.2. Forces 2.3. Work, energy and power 2.4. Momentum and impulse v = u + at F = ma W = Fs cosθ p = mv s = ut + (1/2)at2 Ff ≤ µsR EK = (1/2)mv2 F = Δp/Δt v2 = u2 + 2as Ff ≤ µdR EP = (1/2)kΔx2 EK = p2/2m s = (1/2)(v + u)/t ΔEP = mgΔh power = Fv Efficiency = Wout/Win = Pout/Pin _____________________________________________________________________________________ Topic 3: Thermal concepts 3.1. Thermal concepts 3.2. Modelling a gas Q = mcΔt p = F/A Q = mL n = N/NA pV = nRT EK = (3/2)kBT = (3/2)RT/NA _____________________________________________________________________________________ Topic 4: Waves 4.1. Oscillations 4.2. Travelling waves 4.3. Wave characteristics T = 1/f c = λf I ∝ A2 I ∝ x-‐2 4.4. Wave behaviour 4.5. Standing waves I = I0 cosθ _____________________________________________________________________________________ Topic 5: Electricity and magnetism 5.1. Electric fields 5.2. Electric currents 5.3. Electric cells 5.4. Magnetic effects I = Δq/Δt ΣV = 0 (loop) ε = I(R + r) F = qvB sinθ F = kq1q2/r2 ΣI= 0 (junction) F = BIL sinθ k= 1/(4πε0) R = V/I V = W/q P = VI = I2R = V2/R E = F/q Rtotal = R1 + R2 + … I = nAvq 1/Rtotal = 1/R1 + 1/R2 + … ρ = RA/L _____________________________________________________________________________________ AH AV A _____________________________________________________________________________________ Topic 6: Circular motion and gravitation 6.1. Circular motion 6.2. Newton’s law of gravitation v = ωr F = GMm/r2 a = v2/r = 4π2r/T2 g = F/m F = mv2/r = mω2r g = GM/r2 _____________________________________________________________________________________ Topic 7: Atomic, nuclear and particle physics 7.1. Discrete energy and radioactivity 7.2. Nuclear reactions E = hf ΔE= Δm c2 λ = hc/E 7.3. The structure of matter Charge Quarks Baryon number (2/3)e u c t 1/3 -‐(1/3)e d s b 1/3 All quarks have a strangeness number of 0 except the strange quark that has a strangeness number of -‐1 _____________________________________________________________________________________ Topic 8: Energy production 8.1. Energy sources 8.2. Thermal energy transfer Power = energy/time P = eσAT4 Power = (1/2) Aρv3 λmax = 2.90×10-‐3/T I = power/A albedo = total scattered power / total incident power _____________________________________________________________________________________ Topic 9: Simple harmonic motion 9.1. SHM 9.2. Single-‐slit 9.3. Interference ω = 2π/T θ = λ/b nλ = d sinθ a = -‐ω2x Constructive interference: 2dn = (m + ½)λ x = x0 sin ωt; x = x0 cos ωt; Destructive interference: 2dn = m λ v = ωx0 cos ωt; v = -‐ωx0 sin ωt; v = ±ω sqrt (x02 – x2) 9.4. Resolution 9.5. Doppler effect EK = (1/2)m ω2 (x02 – x2) θ = 1.22 λ/b Moving source: f ‘ = fv/(v ± us) ET = (1/2)m ω2x02 R = (λ/∆λ) = mN Moving observer: f ‘ = f(v ± uo)/v Pendulum: T = 2π sqrt (l/g) ∆f/f = λ/∆λ ≈ v/c Mass-‐spring: T = 2π sqrt (m/k) _____________________________________________________________________________________ Charge Leptons -‐1e e µ τ 0 ν e νµ ντ All leptons have a lepton number of 1 and antileptons have a lepton number of -‐1 Gravitational Weak Electromagnetic Strong Particles experiencing All Quarks, leptons Charged Quarks, gluons Particles mediating Graviton W+, W-‐, Z0 γ Gluons