Physics IGCSE EDEXCEL Core Equations
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Last updated 3:17 PM on 4/11/26
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26 Terms
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speed
speed = distance/time
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acceleration
acceleration = final velocity - initial velocity/time
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final velocity squared
final velocity squared = initial velocity squared + 2 x acceleration x distance
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force
force = mass x acceleration
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weight
weight = mass x gravitational field strength
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momentum
momentum = mass x velocity
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force from momentum change
force = change in momentum/time
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moment
moment = force x perpendicular distance from pivot
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work done
work done = force x distance
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power
power = work done/time
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kinetic energy
kinetic energy = 1/2 x mass x speed^2
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gravitational potential energy
gravitational potential energy = mass x g x height
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efficiency
efficiency = useful energy output/total energy input
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density
density = mass/volume
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pressure
pressure = force/area
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pressure in liquids
pressure = density x g x height
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charge
charge = current x time
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voltage
voltage = current x resistance
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power (IV)
power = current x voltage
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power (I^2R)
power = current^2 x resistance
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energy transferred
energy transferred = charge x voltage
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wave speed
wave speed = frequency x wavelength
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refractive index
refractive index = sini/sinr
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critical angle
critical angle = sin^-1(1/refractive index)
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magnification
magnification = image height/object height
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conservation of momentum
total momentum before = total momentum after