Mass and Energy are interchangeable, and vice-versa. Which of Newtons law is this or is it some other and what does this have to do with flight if somebody coukd tell me I would be pleased

The famous formula created by Albert Einstin
E= M C^2
Where E= Energy , M = Mass , and C = Speed of Light ( Constant )

: )

hi
the law is due to Einstein n not Newton
E = mc^2
basically it comes as a result of theory of relativity.so no flight is involved.
I hope it will help.

I mean mass change into energy , or energy change into mass
should use E = M * C ^2

Newton law stay the F = ma + dm/dt v
but that will not lead us to think mass can change into energy,
:p

According to Einstein's theory of relativity mass and energy are interconvertible.For this purpose the following relation is used.
Energy = (mass)X(square of speed of light)
According to this relation mass and energy can not be destroyed but they can be interconverted.The speed of light is aproximatelly 30,00,00,000 m/s.