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Formulas to Know for AP Physics Test
Formulas to memorize for AP Physics B multiple choice test.
30
Physics
12th Grade
05/16/2011

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Term
Power not using time
Definition
P = FV
Term
First Kinematic Equation
Definition
V = Vo + at
Term
Force on a current carrying wire in a B-field
Definition
F = ILBsin θ
Term
Electric potential R away from point charge Q
Definition
PE = kQ/R
Term
Impulse not using velocity
Definition
ΔP = FΔt
Term
Formula equating energy and mass
Definition
E = mc^2
Term
Formula for Carnot efficiency
Definition
C = (Th - Tc)/Th
Term
Terminal voltage of a battery having internal resistance R
Definition
Vab = E - IR
Term
Formula for change in heat in an isobaric process
Definition
ΔQ = ΔU + W
Term
Work-energy theorem
Definition
W = ΔKE
Term
Critical Angle
Definition
sin θc = N2/N1
Term
Formula for frictional force
Definition
Ff= μmg
Term
Capacitance of a capacitor if area of plates is known
Definition
C = (EoA)/d
Term
Formula relating charge and time
Definition
I = Q/t
Term
Formula for buoyant force if submerged volume is known
Definition
Fb = ρvg
Term
Formulaic definition of Work
Definition
W = Fdcos θ
Term
Period of a pendulum
Definition
2π*sqrt(L/g)
Term
Torque
Definition
T = FLsin θ
Term
Energy of a photon using wavelength
Definition
E = hc/λ
Term
Gauge pressure at the bottom of a swimming pool
Definition
P = ρgh
Term
Force of gravity between two objects with mass m
Definition
F = Gm1m2/r^2
Term
Energy stored in a capacitor
Definition
E = (1/2)cv^2
Term
Third Kinematic equation
Definition
V^2 = 2aΔx + Vo^2
Term
Spring potential energy
Definition
(1/2)kx^2
Term
First law of thermodynamics
Definition
ΔU = W + Q
Term
Electric potential energy of point charge q which is r meters from charge Q
Definition
kqQ/r
Term
Magnetic Flux
Definition
Φ = Bacos θ
Term
New wavelength of light when passing into a different medium
Definition
λn = λ/n
Term
Formula for energy of a spring-mass when spring is neither at maximum displacement nor at equilibrium
Definition
E = (1/2)mv^2 + (1/2)kx^2 = (1/2)kA^2
Term
Formula for finding the magnetic field a distance r from a current carrying wire
Definition
B = UoI/2πr
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