This is a draft cheat sheet. It is a work in progress and is not finished yet.
P1  energy
K.E = 1/2 mv^{2} 
Kinetic energy = 1/2 x mass x (velocity)^{2} 
EPE = 1/2 ke^{2} 
Elastic potential energy = 1/2 x spring constant x (extension)^{2} 
GPE = mgh 
Gravitational potential energy = mass x gravity x height 
TE = mCΔT 
Thermal energy = mass x specific heat capacity x change in temp. 
C = E/mΔT 
Specific heat capacity = energy / mass x change in temp. 
Efficiency = (useful energy output/ total energy input) x100 
WD = Fs 
Work done = Force x distance 
P2  electricity
P = E/t 
Power = energy transferred/ time 
P = WD/t 
Power = work done/ time 
P =V^{2}/ R 
Power = (potential difference)^{2}/ resistance 
P = IV 
Power = current x potential difference 
P = I^{2}R 
Power = (current)^{2} x resistance 
Q = It 
Charge flow = current x time 
V = IR 
Potential difference = current x resistance 
E = ItV 
Energy = current x time x potential difference 
E = QV 
Energy = charge flow x potential difference 
E = Pt 
Energy transferred = power x time 
RT = R1+R2+R3... 
Series circuit total resistance 
1/RT= 1/R2+ 1/R2+ 1/R3... 
Parallel circuit total resistance 


P3  particle model of matter
ρ=m/V 
Density = mass/ Volume 
E=mL 
Energy for a change of state = mass x specific latent heat of fusion OR vaporisation 
PV = constant 
For gases: pressure x volume = constant 
P=F/A 
Pressure = force / area 
P5  forces and motion
v=s/t 
Speed = distance/ time 
v=(v+u)/2 x t 
Average speed = (final speed + initial speed)/2 x time 
a=Δv/ t 
Acceleration = change in velocity/ time 
v=u+at 
Velocity = initial velocity + (acceleration x time) 
v^{2}=u^{2}+2as 
(Final velocity)^{2} = (initial velocity)^{2}+(2 x acceleration x distance) 
s=ut+1/2 at^{2} 
Distance = (initial velocity x time) + (1/2 x acceleration x time^{2}) 
W=mg 
Weight = mass x gravitational field strength 
F=ma 
Newton's 2nd: Force = mass x acceleration 
F=ke 
Force = spring constant x extension 
EPE=1/2 Fe 
Elastic potential energy = 1/2 x Force x extension 
Momentum=mv 
Momentum = mass x velocity 
F=(Δmomentum)/ t 
Force = change in momentum/ time 
Momentum before = momentum after 
Stopping distance = thinking distance + braking distance 
s=1/2 mv^{2}/F 
Braking distance = kinetic energy/ Force 
Moment=Fs 
Moment = Force x distance from pivot 
P = F/A 
Pressure = Force/ Area 
P = hρg 
Pressure in a fluid = height x density x gravity 


P6  waves
v=fλ 
Velocity = frequency x wavelength 
T=1/f 
Period = 1/frequency 
Speed of light = 3x10^{8}m/s 
P7  magnetism and electromagnetism
F=BIl 
Force on a conductor (at right angles to a magnetic field) carrying a current = magnetic flux density x current x length 
Vp/Vs= np/ns 
PD across primary coil/ PD across secondary coil = n^{o} of turns in primary coil/ n^{o} of coils in secondary coil 
VpIp=VsIs 
PD across primary coil x current across primary coil = PD across secondary coil x current across secondary coil 


SI units and symbols
Acceleration 
m/s^{2} 
a 
Area 
m^{2} 
A 
Magnetic flux density 
Tesla (Vs/m^{2}) 
B 
Specific heat capacity 
J/kg^{o}C 
C 
Extension 
Metres (m) 
e 
Energy 
Joules (J) 
E 
Frequency 
Hertz (Hz) 
f 
Force 
Newtons (N) 
F 
Gravitational field strength 
N/kg 
g 
Height 
Metres (m) 
h 
Current 
Amps (A) 
I 
Spring constant 
Newtons per metre (N/m OR Nm^{1}) 
k 
Length 
m 
l 
Specific latent heat 
J/kg 
L 
Mass 
Kilograms (kg) 
m 
Moment 
Nm 
Moment 
Momentum 
kgm/s 
Momentum OR mv 
Pressure 
N/m^{2} 
P 
Power 
Watts (W) 
P 
Charge 
Coulombs (C) 
Q 
Resistance 
Ohms (Ω) 
R 
Displacement/ distance 
Metres (m) 
s 
Time 
Seconds (s) 
t 
Halflife 

t1/2 
Period 
s 
T 
Temperature 
Degrees celcius (^{o}C) 
T 
Velocity/ speed 
Metres per second (m/s OR ms^{1}) 
v 
Volume 
m^{3} 
V 
Potential difference 
Volts (V) 
V 
Work done 
Nm OR J 
WD 
Weight 
Newtons (N) 
W OR mg 
Change in... 

Δ 
Wavelength 
m 
λ 
Density 
kg/m^{3} 
ρ 
Activity 
Becquerels (Bq) 
