Physics > Common Equations
Listed below are the most commonly used equations in physics. They are divided into sections for ease of use.
Energy
| |
Equation |
Written Equation |
Gravitational
potential energy |
GPE = mgh |
Gravitational Potential Energy =
mass x gravity x height |
Work Done |
W = E |
Work Done = Energy transferred |
Efficiency |
- |
Efficiency (%) =
(useful energy out / total energy in) x 100 |
Kinetic Energy |
KE = ½mv2 |
Kinetic Energy = 0.5 x mass x velocity2 |
Power |
P = E / t |
Power = Energy / time |
Work Done |
W = F x s |
Work Done = Force x distance moved
in direction of force |
Forces and Motion
| |
Equation |
Written Equation |
Speed |
s = d / t |
Speed = distance / time |
Weight |
w = m x g |
Weight = mass x gravitational field strangth
(also written as w=mg) |
Density |
d = m / v |
Density = mass / volume |
Force |
F = m x a |
Force = mass x acceleration
(also written as F=ma) |
Acceleration |
a = (v-u) / t |
Accelration = change in velocity / time |
Moment |
m = F x d |
Moment = Force x perpendicular distance from pivot (also written as m=Fd) |
Pressure |
p = F / a |
Pressure = Force / area |
Waves
| |
Equation |
Written Equation |
Velocity |
v = f x λ |
Velocity = frequency x wavelength
(also written as v=fλ).
'λ' is Lambda, the symbol for wavelength
|