# AQA+GCSE+Physics+Equations

```AQA GCSE Physics Equations
Weight (W)
W = mg
weight = mass x gravitational field strength
Work Done (W)
W = Fs
work done= force x distance
Force (F)
on a spring
F = ke
force = spring constant x extension
Moment (M)
M = fd
moment = force x distance from pivot
Pressure (p)
P=𝐴
𝐹
pressure = force &divide; area
Distance (s)
s = vt
distance = speed x time
Acceleration (a)
a=
Resultant Force
(F)
Momentum (p)
F = ma
force = mass x acceleration
p = mv
momentum = mass x velocity
Kinetic Energy
(Ek)
Gravitational
Potential Energy
(Ep)
Power (P)
∆𝑣
𝑡
acceleration = change in velocity &divide; time
Ek = &frac12; mv2
kinetic energy = 0.5 x mass x (speed)2
Ep = mgh
gravitational potential energy = mass x
gravity x height
𝐸
power = energy transferred &divide; time
𝑊
𝑡
power = work done &divide; time
P=𝑡
Power (P)
P=
Energy
Transferred (E)
Efficiency
E = Pt
Efficiency =
Useful energy output
Total energy input
Efficiency
Efficiency =
Useful power output
Total power input
Energy Transferred = power x time
Wave Speed (v)
v = fλ
wave speed = frequency x wavelength
Charge (Q)
Q = It
charge flow = current x time
Potential
Difference (V)
Power (P)
(electrical)
Power (P)
(electrical)
Energy
Transferred (E)
(electrical)
Density (ρ)
V = IR
potential difference = current x resistance
P = IV
power = current x potential difference
P = I2R
power = (current)2 x resistance
E = QV
energy = charge x potential difference
ρ=
m
v
density = mass &divide; volume
```