Physics Equations 2.5 / 5 based on 2 ratings ? PhysicsEquations and FormulaeIGCSEEdexcel Created by: William MayCreated on: 13-01-13 17:07 average speeed (m/s) = distance moved (m) / time taken (s) 1 of 30 momentum (kg m/s) = mass x velocity 2 of 30 unbalanced force (N) = change in momentum (kg m/s) / time taken 3 of 30 turning moment (Nm) = force (N) x perpendicular distance to the pivot (m) 4 of 30 force applied (N) = constant (N/mm) x extension (mm) 5 of 30 orbital speed (m/s) = 2π x orbital radius / time period 6 of 30 In an explosion or recoil: m1 x v1 = m2 x v2 7 of 30 Two objects join together at a collisin: m1 x u(origional velovity) = (m1 + m2) V 8 of 30 electrical power (watts) = current (amps) x voltage (V) 9 of 30 electrical energy (joules) = current (amps) x voltage (V) x time (s) 10 of 30 voltage (V) = current (amps) x resistance (Ω ohms) 11 of 30 charge (coulombs) = current (amps) x time (s) 12 of 30 VOLTAGE (the volt) = THE ENERGY TRANSFERRED (1 joule) PER UNIT CHARGE PASSED (per coulomb) 13 of 30 wavespeed (m/s) = frequency (Hz) x wavelength (m) 14 of 30 frequency (Hz) = 1 / time period (s) 15 of 30 refractive index (n) = sine i / sine r 16 of 30 sine c (critical angle) = 1 / refractive index (n) 17 of 30 efficiency (joules) = useful energy output (N) / total energy input (m) 18 of 30 gravitational potential energy (joules) = mass (kg) x g (m/s^2) x height (m) 19 of 30 kinetic energy (joules) = 1/2 x mass (kg) x (speed)^2 (m/s) 20 of 30 power (watts) = work done (joules) / time taken (s) 21 of 30 power (watts) = energy transfer (joules) / time taken (s) 22 of 30 density (kg/m^3) = mass (kg) / volume (m^3) 23 of 30 pressure (Pa pascals) = force (N) / area (m^2) 24 of 30 pressure difference (Pa pascals) = height (m) x density (kg/m^3) x g (m/s^2) 25 of 30 initial pressure (Pa) / initial absolute temp. (K kelvin) = final pressure (Pa) / final absolute temp. (K kelvin) 26 of 30 absolute temp. (K kelvin) = celsius temp. (°C) + 273 Kelvin 27 of 30 initial pressure (Pa) x initial volume (m^3) = final pressure (Pa) x final volume (m^3) 28 of 30 primary voltage (Vp) / secondary voltage (Vs) = primary turns (np) / secondary turns (ns) 29 of 30 power of primary cct. (V x A) = power of secondary cct. (V x A) 30 of 30
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