 Mechanics:
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Force= Mass × Acceleration ( F=ma)
Weight= Mass × Gravitational field strength ( W=mg)
Pressure= Force/Area ( P=F/A)
Work done= Force × Distance ( W=Fd)
Kinetic energy= 12×Mass×Velocity2 ( KE=12mv2)
Gravitational potential energy= Mass × Gravitational field strength × Height (
GPE=mgh)
 Electricity:
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Current= Charge/Time ( I=Q/t)
Voltage= Current × Resistance ( V=IR)
Resistance=Voltage/Current ( R=V/I)
Power= Voltage × Current ( P=VI)
Energy= Power × Time ( E=Pt)
 Waves:
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Wave speed= Frequency ×Wavelength ( v=fλ)
Frequency= 1Time period ( f=1T )
Wave speed= Distance /Time
Refraction index= Speed of light in vacuum Speed of light in medium ( n=c/v )
 Optics:
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Focal length= 1Focal power
Magnification= Image height/Object height
Refractive index= Sin (angle of incidence) Sin (angle of refraction) (n1×sin(θ1) =n2
×sin(θ2))
Lens formula:1Focal length= 1Object distance+1Image distance
 Thermal Physics:
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Change in thermal energy= Mass × Specific heat capacity × Temperature change (
ΔQ=mcΔT)
Specific heat capacity= Energy supplied Mass × Temperature change
Heat transfer= Mass × Specific latent heat ( Q=mL)