@mab: this is really a hypothetical case, what i really wanted is that i have a body falling , it will gain kinetic energy , how much energy can be converted to electricity , apparently we will need the load in our calculations , so refer to it as L , i dont need the calculations done for me , I want the formula , because i dont have numbers.
@sparweb: dont worry , you wont find anything that complicated , still in senior high school .
Anyway, like i told mab , the main question was how much of the kinetic energy of a falling body can be extracted as electricity ?
i just made up this design to make a linear movement turn a generator