Work J

Power W or J/s

Force N or Kg m/s2

Momentum N s or Kg m/s

Charge C

Speed m/s

Distance m

Time s

Area m2

Volume m3

Speed of Light, c 3x108 m/s2

Electricity

E=IVt Energy=Current*Voltage*time

V=IR Voltage=Current*Resistance

for resistors in series

for resistors in parallel

P=IV Power=Current*Voltage

In a plug, live is brown, neutral is blue and

earth is green/yellow.

C=np Cost=Number of units*Price per Unit.

The voltages around a circuit add up to the battery voltage

Current into a junction=Current Out

Energy

GPE=mgh Gravitational Potential Energy=Mass*9.8*Height

KE=

E=Pt Energy=Power*Time

W=Fd Energy=Force*distance

Waves

v=fspeed=frequency*wavelength

Forces and Motion

F=ma Force=Mass*Acceleration

P=mv Momentum=Mass*Velocity

W=Mg Weight=Mass*9.8

d=st distance=speed*time

v=at velocity=acceleration*time

F=PA Force=Pressure*Area

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