Physics Equations 0.0 / 5 ? Physicsoverview of GCSEGCSEAQA Created by: unnofficialbarCreated on: 14-11-17 18:45 Equation for power (Electrical) P = V x I. power = voltage x current. 1 of 20 Equation for potential difference (Voltage/Electrical) V = I x R. voltage = current x resistance. 2 of 20 Equation for charge (Electrical) Q = I x t. charge = current x time. 3 of 20 Power for energy 1 (Electrical) E = V x Q. energy = voltage x charge. 4 of 20 Power for energy 2 (Electrical) E = V x I x t. energy = voltage x current x time. 5 of 20 Energy efficiency Efficiency (%) = (useful energy out ÷ total energy in) x 100. 6 of 20 Equation for GPE (gravitational potential energy) GPE = mgh. GPE = mass x gravity x height. 7 of 20 Equation for KE KE = ½mv2. Kinetic Energy = 0·5 x mass x velocity2 8 of 20 Equation for energy/work done (Distance) W = F x d. work done = force x distance 9 of 20 Equation for power (time) P = E ÷ t. power = energy ÷ time 10 of 20 Equation for Energy (Heat) E = c x m x θ. energy = specific heat capacity x mass x change in temperature 11 of 20 Equation for speed/velocity s/v = d ÷ t. speed/velocity = distance/Displacement ÷ time 12 of 20 Equation for Acceleration a = (v-u) ÷ t. acceleration = change in velocity ÷ time 13 of 20 Equation for Force F = m x a. Force = mass x acceleration 14 of 20 Equation for weight w = m x g. weight = mass x gravitational field 15 of 20 Equation for momentum p = m x v. momentum = mass x velocity 16 of 20 Equation for change in momentum (mv - mu) = F x t. change in momentum = Force x time 17 of 20 Equation for Density d = m ÷ v. density = mass ÷ volume 18 of 20 Equation for Pressure p = F ÷ a. pressure = force ÷ area 19 of 20 Equation for Wave speed? v = f x λ. Wave speed = frequency x wavelength 20 of 20
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