Forumlae for Nuffield Physics
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Formula	Alternative	Unit
p = F/A	pressure = force/area	Pa or Nm-2
v = d/t	speed = distance/(time taken)	m s-1
p1V1 /T1 = p2V2 /T2
W = Fs	Work done = Force  distance moved in the direction of the force	J
P = W/t	Power = energy transformed/(time taken)	W or Js-1
E = Pt	Electrical energy = Power  time  Electrical energy in kWh = Power in kW  time in hours	J or kWh
E = VIt	electrical energy = potential difference  current  time	J
	moment of a force about a pivot = force  perp distance from force to pivot	Nm
	sum of clockwise moments = sum of anticlockwise moments	Nm
a = Dv/Dt	acceleration = change in velocity/change in time	ms-2
F = ma	Force = mass  acceleration (constant mass)	N
c = f l	wave speed = frequency  wavelength	ms-1
Q = It	Charge = current  time (constant current)	C
V = IR	potential difference = current  resistance	V
P = IV	electric power = current  potential difference	W or Js-1
W = mg	weight = mass  gravitational field strength	N
Ek = ½ mv2	kinetic energy = ½ mass  velocity2	J
Ep = mgDh	increase in gravitational potential energy = mass  g  change in height  (Dh small enough that g is constant)	J
p = mv	momentum = mass  velocity	kg m s-1
F = m v2 / r	centripetal force = mass  velocity2/radius	N
V = W/Q	potential difference = energy transformed/charge transferred	V
R = V/I	Resistance of element = potential difference across element/current	ohms
R = rl/A	resistance = resistivity  length/area	ohms
C = Q/V	capacitance = charge/potential difference	F
pV = nRT	Ideal gas law	J mol-1
F = q1q2/4pe0r2	electric force (radial)	N
E = F/q = V/d	electric field strength for uniform field	V m-1
E = q/4pe0r2	electric field strength for radial field	V m-1
V = q/4pe0r	electric potential at a point	V
F = -Gm1m2/r2	gravitational force	N
g = -Gm/r2	gravitational field strength radial	N kg-1
Vg = -Gm/r	gravitational potential at a point	J kg-1

Other Notes in this Category

1. Forumlae for Nuffield Physics
2. General Equations and Definitions
3. Key Chemical Terms and Vocabulary

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