Physics Equations 0.0 / 5 PhysicsEquations and FormulaeIGCSEEdexcel Created by: BertieCreated on: 18-03-18 13:45 momentum = mass x velocity 1 of 30 momentum before = momentum after 2 of 30 force = change in momentum/time taken 3 of 30 orbital speed = 2 x pi x radius/ time period 4 of 30 secondary voltage/primary voltage = secondary turns/primary turns 5 of 30 critical angle = 1/refractive index 6 of 30 refractive index1 x sin(< incidence) = refractive index2 x sin(< refraction) 7 of 30 refractive index = speed of light in vacuum/speed of light in material 8 of 30 angle of incidence = angle of reflection 9 of 30 wave speed = frequency x wavelength 10 of 30 frequency = 1/ time period 11 of 30 total anti-clockwise moments = total clockwise moments 12 of 30 weight = mass x gravitational field strength 13 of 30 moment = force x perpendicular distance from the pivot 14 of 30 activity = count rate/ time 15 of 30 resistance = voltage/current 16 of 30 charge = current x time 17 of 30 energy transferred = voltage x charge ( charge = current x time) 18 of 30 power = current x voltage 19 of 30 power of heating element = current x voltage OR current2 x resistance 20 of 30 power = work done/time taken 21 of 30 work done = force x distance moved 22 of 30 efficiency = useful energy output/total energy input 23 of 30 force = mass x acceleration 24 of 30 stopping distance = thinking distance + braking distance 25 of 30 kinetic energy = 1/2 x mass x velocity2 26 of 30 gravitational potential energy = mass x gravitational field strength x height 27 of 30 speed = distance/time 28 of 30 velocity = displacement/time 29 of 30 acceleration change in velocity/ time taken 30 of 30

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