Physics01
Newton's Second Law
F = m a
The force on an object equals its mass times its acceleration.
Physics reference
Physics formulas, made clear.
Physics describes how the universe behaves, from a rolling ball to a flowing current. Each formula here is a rule you can apply to real situations — with a note on exactly when to use it.
Physics02
Kinetic Energy
KE = ½ m v²
The energy an object carries because it is moving.
Physics03
Ohm's Law
V = I R
Voltage across a resistor equals current through it times its resistance.
Physics04
Equation of Motion
v = u + a t
Final velocity from initial velocity, acceleration and time.
Physics05
Gravitational PE
PE = m g h
Stored energy from an object being raised to a height h.
Physics06
Wave Speed
v = f λ
A wave travels at its frequency times its wavelength.