Formulae for AS level

This list may not be exhaustive. It was complied by referring to past papers and to the syllabus.

 

 

Waves & Optics

 

 

            

 

 

 

 

 

Electricity

 

Scaled area under a current-time curve = charge which has flowed

 

           

 

 

 

 

 

 

 

 

 

 

 

     (conductivity & resistivity)

 

 

Materials

 

    (stress)

 

   (strain)

 

 

Scaled area under a force-extension curve = energy stored

 

Scaled area under a stress-strain curve = energy stored per unit volume

 

Gradient of a stress-strain curve is the Young modulus

 

 

Mechanics & General

 

Scaled area under a velocity-time curve = distance travelled

 

Gradient of a distance-time curve is velocity

 

Gradient of a velocity-time curve is acceleration

 

For a vector A making an angle q  with the horizontal,

Horizontal component of A = A cos q

Vertical component of A = A sin q

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Quantum physics