PHYSICS Y10 END OF YEARS FORMULAE

formulae

the relationship between average speed, distance moved and time taken

average speed \= distance/time

the relationship between acceleration, change in velocity and time taken

acceleration \= (change in velocity) / time

the relationship between unbalanced force, mass and acceleration

unbalanced force \= mass x acceleration

the relationship between weight, mass and gravitational field strength

weight \= mass x g

(triple award only) the relationship between momentum, mass and velocity

momentum \= mass x velocity

(triple award only) the relationship between the moment of a force and its perpendicular distance from the pivot

moment \= force x perpendicular distance from pivot

the relationship between voltage, current and resistance

voltage \= current × resistance

the relationship between charge, current and time

charge \= current x time

the relationship between the speed, frequency and wavelength of a wave

speed \= frequency x wavelength

the relationship between frequency and time period

Frequency \= 1 / time period

the law of reflection

angle of incidence \= angle of reflection

the relationship between refractive index, angle of incidence and angle of refraction

refractive index \= sin i / sin r

the relationship between critical angle and refractive index

sin(critical angle) \= 1 / refractive index

the relationship between efficiency, useful energy output and total energy output:

efficiency \= useful energy output / total energy output (x100 for percent)

the relationship between work done, force and distance moved in the direction of the force

work \= force x distance

the relationship between gravitational potential energy, mass, gravitational field strength and height

GPE \= mass x g x height

kinetic energy

1/2 mv^2

the relationship between density, mass and volume

Density \= mass/volume

the relationship between pressure, force and area

pressure \= force/area

the relationship for pressure difference

density x g x height