Physics Equations P1-7 5.0 / 5 based on 1 rating ? PhysicsEquations for Paper 1GCSEAQA Created by: lbamfordCreated on: 03-11-18 09:17 Work Done Work Done(J) = Force (N) x Distance moved in direction of force(m) 1 of 25 Change in Gravitational Potential Energy Change in GPE(J) = mass(KG) x GFS(N/KG) x change in height(m) 2 of 25 Kinetic Energy Kinetic Energy (J) = 0.5 x mass(KG) x speed of object^2 (m/s) 3 of 25 Elastic Potential Energy Elastic PE(J) = 0.5 x spring constant(N/m) x extension^2(m) 4 of 25 Efficiency Useful energy/ total energy supplied x 100 5 of 25 Power (of an appliance) Power (W) = energy(J)/ time taken (secs) 6 of 25 Efficiency (in terms of power) Efficiency = useful power output/ total power input (x100) 7 of 25 Energy Required to change the Temperature of a substance Energy needed(J) = mass(KG) x specific heat capacity(J/KG*C) x temperature change(*C) 8 of 25 Specific Heat Capacity Specific Heat Capacity = energy needed(J)/ mass x temp. change 9 of 25 Current Current (A) = charge(C)/ time(secs) 10 of 25 Charge flow Q = I X t 11 of 25 Potential Difference P.D (V) = energy (J) / charge (C) 12 of 25 Resistance Resistance (ohms) = p.d (V)/current(A) 13 of 25 Resistors connected in series (total resistance) R total= R1 + R2 14 of 25 Current in component of parallel Current = p.d/ resistance 15 of 25 Frequency Freq. = 1/time taken for 1 cycle 16 of 25 Energy Energy = power x time 17 of 25 Power Power = current x p.d 18 of 25 Current through an appliance (rearranged power) current = power / p.d 19 of 25 Energy transferred to component by flow charge Energy = p.d x Charge 20 of 25 Density Density (kg/m^3) = mass/ volume 21 of 25 Specific Latent heat of Fusion SLH of Fusion (J/KG) = energy needed/ original mass 22 of 25 Pressure Pressure (Pa) = constant / volume 23 of 25 Count rate after n half-lives Count rate after n half-lives = intuit count rate/2n 24 of 25 No. of unstable nuclei after n half-lives = initial no. of unstable nuclei / 2n 25 of 25
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