Category
Physics
Physics formulas and calculators for kinematics, energy, and waves describing how objects move and interact in the physical world. Includes motion, force, momentum, and oscillatory system equations.
39Formulas
3Subcategories
Updated Jul 2026
General
Volumetric Thermal Expansion
delta_V = beta * V0 * delta_T
General
Root-Mean-Square Speed of Gas Molecules
v_rms = sqrt(3 * R * T / M)
General
Boltzmann Entropy Formula
S = k * ln(W)
General
Change in Entropy (Reversible Process)
delta_S = Q / T
General
Schwarzschild Radius
r_s = 2 * G * M / c^2
General
Relativistic Momentum
p = (m * v) / sqrt(1 - v^2/c^2)
General
Length Contraction (Special Relativity)
L' = L * sqrt(1 - v^2/c^2)
General
Time Dilation (Special Relativity)
t' = t / sqrt(1 - v^2/c^2)
General
Heisenberg Uncertainty Principle
delta_x * delta_p >= h_bar / 2
General
Planck's Energy-Frequency Relation
E = h * f
General
de Broglie Wavelength
lambda = h / p
General
Photoelectric Effect Equation
KE_max = h*f - phi
General
Malus's Law (Polarization)
I = I0 * cos(theta)^2
General
Single-Slit Diffraction Minima
a * sin(theta) = m * lambda
General
Critical Angle (Total Internal Reflection)
theta_c = arcsin(n2 / n1)
General
Index of Refraction
n = c / v
General
Wave Intensity
I = P / A
General
Doppler Effect (Sound, Moving Source)
f_observed = f_source * (v_sound / (v_sound - v_source))
General
Beat Frequency
f_beat = |f1 - f2|
General
Magnetic Force on a Moving Charge
F = q * v * B * sin(theta)
General
Self-Inductance EMF
EMF = -L * (delta_I / delta_t)
General
Faraday's Law of Electromagnetic Induction
EMF = -N * (delta_Phi / delta_t)
General
Magnetic Flux
Phi = B * A * cos(theta)
General
Electric Field Between Parallel Plates
E = V / d
General
Electric Field of a Point Charge
E = k * q / r^2
General
Ohm's Law
V = I * R
General
Work Done by a Force
W = F * d * cos(theta)
General
Time of Flight (Projectile Motion)
t = 2 * v * sin(theta) / g
General
Projectile Maximum Height
H = v^2 * sin(theta)^2 / (2*g)
General
Projectile Range
R = v^2 * sin(2*theta) / g
General
Period of a Simple Pendulum
T = 2 * pi * sqrt(L / g)
General
Rotational Kinetic Energy
KE_rot = 0.5 * I * omega^2
General
Moment of Inertia (Point Mass)
I = m * r^2
General
Conservation of Momentum (Elastic Collision, 1D)
m1*v1 + m2*v2 = m1*v1' + m2*v2'
General
Impulse-Momentum Theorem
J = F * t = delta_p
General
Linear Momentum
p = m * v
Waves
Wave Speed Equation
v = fλ
Kinematics
Newton's Law of Universal Gravitation
F = Gm₁m₂ / r²
Kinematics
Equations of Motion (Constant Acceleration)
v = u + at