physics IGCSE 2025
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32 Terms
Speed
distance/time
Acceleration
Change in velocity divided by the time it takes for the change to occur
Weight
Mass x gravitational field strength
Density
mass/volume
Hooke's Law (Force)
constant x extension
pressure
force/area
Fluid Pressure
density x gravity x height
Work done
force x distance
Power
Work done / time
kinetic energy
1/2 x mass x speed^2
GPE
mass x gravity x height
Moment
Force x perpendicular distance from pivot
Impulsive force
Change in momentum / time
impulse
change in momentum or force x time
Energy (SHC)
Mass x change in temperature x SHC
Wave speed
frequency x wavelength
Frequency
1/period
refractive index
sin i / sin r
refractive index
Speed of light in a vacuum/Speed of light in the medium
refractive index
1 / sin (critical angle)
current
charge/time
Voltage
current x resistance
Voltage
energy/charge
Power (circuit)
current x voltage
Power(circuit)
current^2 x resistance
Energy Transfer
voltage x current x time
Resistors in series
R(total) = R1 + R2 + R3 +...
Resistors in parallel
1/R = 1/R1 + 1/R2
Transformers
Voltage in secondary coil/ Voltage in primary coil = Turns on Secondary coil/ Turns on primary coil
Average orbital speed
2 x pi x orbital radius / orbital period
Hubble constant (H0)
2.2 x 10^-18 s^-1
distance of a far away galaxy/speed away from us
1/Hubble constant