Equations Revision list

Speed = Distance/time

Speed = (v+u)/2

Acceleration = (v-u)/t

Velocity = Displacement/time

Velocity = (v+u)/2

Acceleration = (v-u)/t

resultant force = Mass X acceleration

Weight = mass X gravity

F = ke

Force = extension X spring constant

1Pa = 1 N/m2

Pressure = Force/area

moment = force X perpendicular distance from the pivot

Density = mass/volume

Efficiency = Useful output/total input

Work = force X distance

Power = energy transferred(work done)/time taken

Power is measured in Watts

1 Watt = 1J/S

Kinetic energy = ½ X m X v2

GPE = mgh

Alpha decay produces: 4 neutrons and 2 protons(Helium nucles)

Beta decay produces: 1 electron. 0 mass, -1 charge

Gamma decay produces: Gamma ray