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Physics Formulae For Beginners Essay

470 words - 2 pages

Electrical energy in the homeE = F/qE = electric field strengthF = forceq = chargeE = kq/r2E = electric field strengthk = 9.00 x 109q = charger = separation of chargesF = EqF = forceE = electric field strengthq = chargeR = V/IR = resistanceV = potential dropI = currentR = kl/AR = resistancek =P = VI (P = V2/R or P = I2R)P = PowerV = Voltage riseI = CurrentR = resistanceW = ...view middle of the document...

v - u = atv = u + atF = maW - air resistance = maWhen dense objects fall through small distances near the surface of the Earth it is usually quite reasonable to assume that the air resistance is negligible. Thus:W = mamg = ma (where g is the gravitational field strength)g = aW = weightm = massF = mv2/rF = centripetal force (the net force on an object traveling in a circular path at constant speed. It is directed towards the centre of the circle)m = massv = constant speedr = radiusEk = 1/2mv2Ek = kinetic energym = massv = speedW = FsW = workF = magnitude of forces = displacement in the direction of the forcep = mvp = momentumm = mass of objectv = velocityI = FtI = impulseF = forcet = timeV = W/QV = potential difference in voltsW = work done by field in joulesQ = charge being pushed in coulombs

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