average speed, distance and time: 1 The relationship between average speed, distance and time:

acceleration, velocity and time: 2 The relationship between acceleration, velocity and time:

force, mass and acceleration: 3 The relationship between force, mass and acceleration:

density, mass and volume: 4 The relationship between density, mass and volume:

work done, force and distance: 5 The relationship between work done, force and distance:

6 The principle of moments:

moment, force and perpendicular distance from the pivot: 7 The relationship between moment, force and perpendicular distance from the pivot:

momentum, mass and velocity: 8 The relationship between momentum, mass and velocity:

kinetic energy, mass and velocity: 9 The relationship between kinetic energy, mass and velocity:

gravitational potential energy, mass and height: 10 The relationship between gravitational potential energy, mass and height:

The relationship between 11 The relationship between mass, weight and g:

pressure, force and area: 12 The relationship between pressure, force and area:

pressure difference, height, density and g: 13 The relationship between pressure difference, height, density and g:

charge, current and time: 14 The relationship between charge, current and time:

voltage, current and resistance: 15 The relationship between voltage, current and resistance:

electrical power, voltage and current: 16 The relationship between electrical power, voltage and current:

total resistance in a series circuit: 17 The relationship for total resistance in a series circuit:

total resistance in a parallel circuit: 18 The relationship for total resistance in a parallel circuit:

wave speed, frequency and wavelength: 19 The relationship between wave speed, frequency and wavelength:

voltage and turns in a transformer: 20 The relationship between voltage and turns in a transformer:

input and output power in a transformer: 21 The relationship between input and output power in a transformer:

refractive index, angle of incidence and angle of refraction: 22 The relationship between refractive index, angle of incidence and angle of refraction:

refractive index and critical angle: 23 The relationship between refractive index and critical angle:

distance d (m) time t (s) average speed s/v (m/s) =

change in velocity v – u (m/s) time taken t (s) acceleration a (m/s2) =

force F (N) = mass m (kg) × acceleration a (m/s2)

mass m (kg) volume V (m3) density ρ (kg/m3) =

work done W (J) = force F (N) × distance d (m) (Nm) moved in direction of force

anti-clockwise moments M (Nm) = clockwise moments M (Nm)

moment M (Nm) = force F (N) × distance d (m) perpendicular from the pivot

momentum p (kg m/s) = mass m (kg) × velocity v (m/s)

kinetic energy K.E. (J) = × mass m (kg) × velocity v2 (m/s) 1 2 kinetic energy K.E. (J) = × mass m (kg) × velocity v2 (m/s)

gravitational potential energy G. P. E gravitational potential energy G.P.E. (J) = mass m (kg) × g (m/s2) × height h (m)

weight w (N) = mass m (kg) × g (m/s2)

force F (N) area A (m2) pressure P (Pa) = (N/m2)

pressure difference p (Pa) = height h (m) × density ρ (kg/m3) × g (m/s2)

charge Q (C) = current I (A) × time t (s)

voltage V (V) = current I (A) × resistance R (Ω)

electrical power P (W) = voltage V (V) × current I (A)

total resistance RT (Ω) = R1 (Ω) + R2 (Ω) + R3 (Ω) + …. + Rn (Ω)

1 1 1 1 1 = + + + …. + RT (Ω) R1 (Ω) R2 (Ω) R3 (Ω) Rn (Ω)

wave speed v (m/s) = frequency f (Hz) × wavelength λ

= input (primary) voltage VP (V) primary turns nP output (secondary) voltage VS (V) secondary turns nS

input power VPIP (W) = output power VSIS (W)

sin i angle of incidence sin r angle of refraction refractive index n =

1 n refractive index sin c critical angle =