Formulae/Relationships 0.0 / 5 ? PhysicsEquations and FormulaeIGCSEEdexcel Created by: KateCreated on: 23-03-13 11:25 Mass, density, volume Mass = density x volume 1 of 28 Wave speed, wavelength, frequency Wave speed = wavelength x frequency 2 of 28 Voltage, current, electrical power Electrical power = voltage x current 3 of 28 GPE, mass, gravity, height GPE = mass x gravity (10 at IGCSE) x height 4 of 28 Velocity, height, gravity Velocity = (2 x height x gravity) 5 of 28 Charge, time, current Charge = time x current 6 of 28 Work done, force, distance moved Work done = force x distance moved in the direction of the force (DMitDotF) 7 of 28 Force, mass, acceleration Force = mass x acceleration 8 of 28 Pressure underwater, density, gravity, height, air pressure at sea level P. underwater = density x gravity x height + air pressure at sea level 9 of 28 Acceleration, change in velocity, time Acceleration = change in velocity / time 10 of 28 Momentum, velocity, mass Momentum = velocity x mass 11 of 28 Efficiency, useful energy output, total energy input Efficiency = useful energy output / total energy input 12 of 28 Refractive index, critical angle Sin(c) = 1 / refractive index 13 of 28 Average speed, distance, time Average speed = distance / time 14 of 28 Weight, mass, gravitational field strength Weight = mass x gravitational field strength (10 on Earth) 15 of 28 Refractive index, angle of incidence, angle of reflection Refractive index = sin(angle of incidence) / sin (angle of reflection) 16 of 28 Pressure, force, area Pressure = force / area 17 of 28 Voltage, current, resistance Resistance = voltage / current 18 of 28 Kinetic energy, speed, mass Kinetic energy = mass x speed squared / 2 19 of 28 Moment, force, perpendicular distance from pivot Moment = force x perp. distance from pivot 20 of 28 Angle of incidence, angle of reflection Angle of incidence = angle of reflection 21 of 28 Input power, output power (for 100% efficiency) Input power = output power; V1 x I1 = V2 x I2 22 of 28 Clockwise motion, anti-clockwise motion (on a bridge) Clockwise motion = anti-clockwise motion 23 of 28 Volume, pressure Volume x pressure = constant; V1P1 = V2P2 24 of 28 Energy transferred, work done Energy transferred = work done 25 of 28 Temperature, pressure (what unit must temp. be in?) Temperature in Kelvin. P1 / T1 = P2 / T2 26 of 28 Pressure from slave to master piston, force, area P from S – M piston = force on slave / area of master 27 of 28 Pressure from master to slave piston, force, area P from M – S piston = force on master / area of slave 28 of 28
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