## Physics Formula List

 Physical Quantity Formula Remarks Equations of motion at constant acceleration  Density  Weight W = mg W = weight, Nm = mass, kgg = gravitational acceleration, m/s2 or N/kg Force F = ma F = force, Nm = mass, kga = acceleration, m/s2 Moment of a force about a point  Object in equilibrium with parallel forces acting on it  Work done W = Fd W = work done, JF = force, Nd = displacement, m Kinetic energy K.E.= 1/2 mv2 K = kinetic energy, Jm = mass, kgv = velocity, m/s Potential energy P.E. = mgh Ep = potential energy, Jm = mass, kgg = gravitational acceleration, N/kg or m/s2h = gain/loss in height Efficiency Power P = power, WW =  work done or energy transferred, Jt = time, sE = energy transferred/used, JQ = thermal energy transferred, J Pressure  Liquid pressure  Boyle's Law  Specific heat capacity  Specific latent heat of vaporization or fusion  Wave equation  Refractive index  n = refractive indexi = angle in air/vacuumr = angle in mediumc = speed of light in vacuum, m/sv = speed of light in medium, m/s Critical angle  Amount of charge Q = It Q = charge, Ct = time, s Ohm's Law V = IR V = potential difference, VI = current, A Potential difference V = W/Q V = potential difference, VW = work done between two points, JQ = charge, C emf  Electrical power P = IV = I2R P = power, WI = current, AV = potential difference, V (voltage) Electrical energy E = VIT E = electrical energy, J Resistance p = resistivity, ohml = length of wire, mA = cross-sectional area of wire, m2 Transformer equations   