Physics Equations for Edexcel IGCSE

Physics Equations  SPEED = DISTANCE / TIME  ACCELERATION = CHANGE IN VELOCITY / TIME TAKEN FORCE = MASS x ACCELERATION (F=ma)  MOMENTUM = MASS x VELOCITY FORCE = CHANGE IN MOMENTUM / TIME TAKEN  MOMENT = FORCE x PERPENDICULAR DISTANCE FROM PIVOT  IN EQUILIBRIUM SUM OF CLOCKWISE MOMENTS = SUM OF ANTICLOCKWISE MOMENTS  ORBITAL SPEED = 2πr / t (2 x π x RADIUS / TIME)  POWER = CURRENT x VOLTAGE (P=IV)  ENERGY = POWER x TIME, ENERGY = CURRENT x VOLTAGE x TIME (E = Itv)  CHARGE = CURRENT x TIME (Q=It)  VOLTAGE = CURRENT x RESISTANCE (V=IR)  FREQUENCY OF A WAVE = 1 / PERIOD WAVESPEED = FREQUENCY x WAVELENGTH (V = fλ)  LAW OF REFLECTION = ANGLE I = ANGLE R REFRACTIVE INDEX, n = sin i / sin r  n = 1 / sinC , sinC = 1 / n  EFFICIENCY = (USEFUL ENERGY OUT / TOTAL ENERGY IN) x  WORK = FORCE x DISTANCE GPE = MASS x GRAVITY x HEIGHT (GPE = mgh)  KE = 1/2 x MASS x VELOCITY²  POWER = WORK DONE / TIME TAKEN  HALF LIFE = INITIAL SAMPLE x 1/2 n  DENSITY = MASS / VOLUME

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