SAT Physics Formulas

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Author:
Henri93
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308652
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SAT Physics Formulas
Updated:
2015-09-28 12:37:16
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SAT Physics Formulas
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SAT Physics Formulas
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  1. Big Five #4
    Missing D
    Vf = Vi + At
  2. Projectile Motion
    Y position
    Dy = Vsinθ(t) - (1/2)gt^2
  3. Big Five #1
    Missing Acceleration
    D = (1/2)(Vf+Vi)(t)
  4. Inclined Plane
    Normal Force
    Fn = mg*cosθ
  5. Inclined Plane
    Gravity Pushing Down Plane Force
    Fx = mg*sinθ
  6. Velocity of a Satellite
    Relationship between Period and Orbital Radius
    • v = sqrt(GM/R)
    • T is proportional to Rsqrt(R)
    • If R is increased by 4 then T is increased by 4sqrt(4)
  7. Projectile Motion
    X position
    Dx = Vcosθ(t)
  8. Big Five #5
    Missing t
    Vf^2 = Vi^2 + 2AD
  9. Big Five #2
    Missing Vf
    D = Vi(t) + (1/2)At^2
  10. The Universal Gravitational Constant
    G = 6.67 * 10^-11
  11. Newton's Law of Force of Gravity
    Fg = G(m1*m2)/r^2
  12. Pulley System
    Relationship of Force
    In general, pulley systems multiply our force by the number of strings pulling on the object
  13. Force of Friction
    Ff = μmg
  14. Big Five #3
    Missing Vi
    D = Vf(t) - (1/2)At^2
  15. Projectile Motion
    Y velocity at point
    Vy = Vsinθ -g(t)
  16. First Law of Thermodynamics
    The total amount of energy in a system will remain constant; it will be conserved
  17. Work
    • W = Fdcosθ
    • W = Fd
    • W = MAD
  18. Kinetic Enegy
    KE = (1/2)mv^2
  19. Work-Energy Theorem
    W = ΔKE
  20. Potential Energy
    PE = mgh
  21. Mechanical Energy
    • ME = PE + KE
    • KE1 + PE1 = KE2 + PE2
  22. Escape Velocity
    Ve = sqrt(2GM/r)
  23. Power
    P = W/t
  24. Latent Heat of Transformation
    • Q = mL
    • L is heat of fusion for S->L
    • L is heat of vap for L->V
  25. Calorie
    1c = 4.18J
  26. Heat
    Q = mCΔT
  27. Kelvin
    K = C + 273
  28. Volume Expansion
    • ΔV = β*Vi*ΔT
    • β = 3α
  29. Pressure
    P = F/Area
  30. Avogadro's Constant
    6.022 * 10^23
  31. Linear Expansion
    ΔL = α*Li*(ΔT)
  32. Molar Mass
    • M = Na * AMU
    • Na is avagadro's constant
  33. Ideal Gas Law
    PV = nRT
  34. Universal Gas Constant
    R = 8.31 J/molK
  35. 0th Law of Thermodynamics
    If object 1 and 2 are each in thermal equilibrium with object 3, then objects 1 and 2 are in thermal equilibrium
  36. Ideal Gas Energy
    Root Mean Square Speed
    • Kavg = (3/2)KbT
    • Vrms = sqrt(3RT/M)
  37. Work(Pressure)
    W = PΔV
  38. Efficiency
    Eff = Wout/Win * 100
  39. A collision is elastic if..
    • The total kinetic energy is reserved
    • //Not likely in real life
  40. Impulse Momentum Theorem
    • J = FΔt
    • J = Δp
  41. Linear Momentum
    p = mv
  42. Torque
    • τ = r*F*sinθ
    • τ = L * F
  43. Law of Torque
    • Tnet = Iα
    • //I is moment of inertia
    • //α is angular acceleration
  44. Centripetal Acceleration
    Ac = v^2/r
  45. Angular Acceleration
    α = Δω/Δt
  46. Kepler's 1st Law
    The orbit of each planet is an ellipse and the sun is at one focus
  47. Kepler's 2nd Law
    An imaginary line from the sun to a moving planet sweeps out equal areas in the same interval of time
  48. Kepler's 3rd Law
    The ratio of the square of a planet's period of revolution to the cube of its average distance from the sun is a constant that is the same for all planets. T^2/a^3
  49. Angular Velocity
    ω = Δθ/Δt
  50. Conservation of Angular Momentum
    • τnet = ΔL/Δt
    • //L = mrv
  51. Angular Momentum
    L = rmv
  52. Hooke's Law of String
    Fs = kx
  53. Simple Harmonic Motion
    Elastic Potential Energy
    Us = (1/2)kx^2
  54. Simple Harmonic Motion
    Period and Frequency
    • f = (1/2pi)sqrt(k/m)
    • T = 2pi * sqrt(m/k)
  55. Period and Frequency
    • T = 1/f
    • f = 1/T
  56. Pendulum 
    Frequency and Period
    • f = (1/2pi)sqrt(g/L)
    • T = 2pi * sqrt(L/g)
  57. Electrical Field Strength Vector
    E = K(Qsource/r^2)
  58. Coulombs's Constant K
    K = 9 * 10^9 Nm^2/C^2
  59. Coulomb's Law
    Fe = K(q1 * q2)/r^2
  60. Elemental Charge
    1.6 * 10^-19
  61. Electrical Potential
    V = KQ/R
  62. Change in Electrical Potential Energy
    • ΔV = qΔΦ
    • ΔV = qV
  63. Capacitance
    C = Q/V
  64. Electrical Resistance
    Ω = ΔV/I
  65. Electrical Current
    I = ΔQ/Δt
  66. Electrical Power
    • P = IV
    • P = I^2 * R
    • P = V^2/R
  67. To get total resistance when resistors are in a series you...
    add resistances
  68. To get the total resistance when resistors are in parallel you...
    Add the reciprocals then take the reciprocal
  69. The equivalent capacitance of a collection of capacitors is found by...
    Adding Them
  70. The total capacitance of capacitors in a series is found by...
    Adding reciprocals and taking the reciprocal
  71. Magnetic Force on a current carrying wire
    Fb = I * l *Bsinθ
  72. Magnetic Force on a moving charge
    Fb = |q|vBsinθ
  73. Magnetic Field units
    • Teslas
    • 1 Gauss = 10^-4 Tesla
  74. Speed of a Wave
    V = fλ
  75. Faraday's law of electromagnetic induction
    ξ = -ΔΦ/Δt
  76. Magnetic Flux
    • Φ = BAcosθ
    • //A is area
    • //B is field strength
  77. Motional Electro-Magnetic Force
    ε = vBl
  78. Wave Speed on Stretched String
    V = sqrt(Ft(L/m))
  79. Doppler Effect
    Fd = fs * ((v±vd)/(v±vs))
  80. Open Pipe Formula
    Fn = nv/2L
  81. Closed Pipe Formula
    Fn = nv/4L
  82. Sound
    Decibels
    dB = 10log(I/10^-12)
  83. Sound Intensity
    • I = P/A
    • //P is power
    • //A is usually 4pi r^2
  84. Resonant Frequency of String
    Fn = nv/2L

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