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Physics Formulas
Browse 0 reviewed physics formulas with concrete inputs, outputs, calculations, applicability checks, and LaTeX.
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Physics
Boltzmann Entropy
S=k_B\ln\OmegaRelates thermodynamic entropy to multiplicity.
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Classical Kinetic Energy
K=\frac12mv^2Computes translational kinetic energy in classical mechanics.
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Coulomb Law
F=k\frac{|q_1q_2|}{r^2}Computes electrostatic force magnitude between point charges.
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Coulomb's Law
F=k\frac{|q_1q_2|}{r^2}Calculates the magnitude of the electrostatic force between two point charges.
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Density Formula
\rho=\frac{m}{V}Calculates mass per unit volume for a material or object.
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Electric Power
P=VICalculates electrical power from voltage and current.
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Energy Stored in a Capacitor
U=\frac12CV^2Computes energy stored in an ideal capacitor.
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First Law of Thermodynamics
\Delta U=Q-WRelates internal-energy change, heat, and work under a stated sign convention.
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Gravitational Potential Energy
U=mghApproximates gravitational potential energy near Earth surface.
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Ideal Gas Law
PV=nRTRelates pressure, volume, amount, and absolute temperature for an ideal gas.
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Kinetic Energy
K=\frac{1}{2}mv^2Calculates translational kinetic energy.
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Linear Momentum
\mathbf p=m\mathbf vDefines linear momentum as mass times velocity.
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Mass Energy Equivalence
E=mc^2Relates rest energy to mass.
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Newton Second Law
\mathbf F_{net}=m\mathbf aRelates net force, mass, and acceleration.
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Ohm Law
V=IRRelates voltage, current, and resistance for an ohmic element.
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Photon Energy
E=hfRelates photon energy to frequency through Planck constant.
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Pressure Formula
P=\frac{F}{A}Calculates average pressure as perpendicular force divided by the area receiving that force.
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Simple Harmonic Motion
x(t)=A\cos(\omega t+\varphi)Describes ideal periodic motion whose restoring force is proportional to displacement.
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Wave Speed
v=f\lambdaRelates wave speed, frequency, and wavelength.
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de Broglie Wavelength
\lambda=\frac hpRelates particle wavelength to momentum.
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