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.
28Formulas
3Subcategories
Updated Oct 2026
Energy
Volumetric Thermal Expansion
delta_V = beta * V0 * delta_T
Energy
Root-Mean-Square Speed of Gas Molecules
v_rms = sqrt(3 * R * T / M)
Energy
Boltzmann Entropy Formula
S = k * ln(W)
Energy
Change in Entropy (Reversible Process)
delta_S = Q / T
Energy
Schwarzschild Radius
r_s = 2 * G * M / c^2
Kinematics
Relativistic Momentum
p = (m * v) / sqrt(1 - v^2/c^2)
Kinematics
Length Contraction (Special Relativity)
L' = L * sqrt(1 - v^2/c^2)
Kinematics
Time Dilation (Special Relativity)
t' = t / sqrt(1 - v^2/c^2)
Waves
Heisenberg Uncertainty Principle
delta_x * delta_p >= h_bar / 2
Waves
Planck's Energy-Frequency Relation
E = h * f
Waves
de Broglie Wavelength
lambda = h / p
Waves
Photoelectric Effect Equation
KE_max = h*f - phi
Waves
Wave Intensity
I = P / A
Waves
Doppler Effect (Sound, Moving Source)
f_observed = f_source * (v_sound / (v_sound - v_source))
Waves
Beat Frequency
f_beat = |f1 - f2|
Energy
Work Done by a Force
W = F * d * cos(theta)
Kinematics
Time of Flight (Projectile Motion)
t = 2 * v * sin(theta) / g
Kinematics
Projectile Maximum Height
H = v^2 * sin(theta)^2 / (2*g)
Kinematics
Projectile Range
R = v^2 * sin(2*theta) / g
Waves
Period of a Simple Pendulum
T = 2 * pi * sqrt(L / g)
Energy
Rotational Kinetic Energy
KE_rot = 0.5 * I * omega^2
Kinematics
Moment of Inertia (Point Mass)
I = m * r^2
Kinematics
Conservation of Momentum (Elastic Collision, 1D)
m1*v1 + m2*v2 = m1*v1' + m2*v2'
Kinematics
Impulse-Momentum Theorem
J = F * t = delta_p
Kinematics
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