Formulae

These will not be given to you

Velocity	v = x       t	v = velocity - m/s x = displacement  - m t = time – s
Average speed	Av speed = distance                        time
Acceleration	a = change in velocity                  time a = (v – u)             t	a = acceleration – m/s2  v = final velocity – m/s u = final velocity – m/s t – s
Force	F = ma	F = Force – N m = mass – kg a = accln m/s2
Momentum	P = m x v	P = momentum - kgm/2 m = mass –kg v = velocity – m/s
Density	ρ = m        V	ρ = density – kg/m3 m = mass – kg V = volume m3
Work	W = Fx	W = work – J F = Force – N x = distance – m
Kinetic energy	KE = ½ mv2	KE – J m = mass – kg v = velocity – m/s
Gravitational Potential Energy	GPE = mgh	GPE – J m = mass – kg g = gravitational field strength – N/kg h = vertical height – m
Weight	w = mg	W = weight – N m = mass – kg g = gravitational field strength – N/kg
Pressure	P = F       A	P = pressure – Pa F = Force N A = Area – m2
Pressure in fluids	P = hρg	P = pressure – Pa ρ = density – kg/m3 h = vertical height – m
Moment	Moment = Force x distance	Moment – Nm
Electric Charge	Q = It	Q = charge – C I = current – A t = time – s
Ohm’s Law	V = IR	V = voltage – V I = current – A R = resistance Ω
Electrical Power	P = IV	P = power – W I = current – A V = voltage – V
Electrical Energy	E = IVt	E = energy J I = current – A V = voltage – V t = time – s
transformer	Vp  = Np Vs      Ns Input power = output power VpIp = VSIS 100% efficiency	Vp = voltage in primary Vs = voltage in secondary Np = number of turns in primary Ns = number of turns in secondary I = current
Wave equation	v = fλ	v = velocity m/s f = frequency – Hz λ = wavelength – m
Refractive index	n = sin i       sin r	i = angle of incidence r = angle of refraction
Critical angle	Sin c = 1              n

Copied from the front of an examination papers

tso there is no excuse for not knowing the units of acceleration!