  At the heart of Leibniz’s main line of argument lie four premises:  (1) The amount of force a body acquires in virtue of falling from a  certain altitude is equal to the amount of force that would be  required to raise that same body to the same altitude. (2) The amount of force a one pound body acquires by falling from a height of four  meters is equal to the amount of force a four pound body acquires by  falling from a height of one meter. (3) Galileo’s Law: the distance  traveled by a falling body is directly proportional to the square of  the time it falls (i.e. d = at2 where a  is a constant); so, to illustrate, a falling body traveling a  distance of one meter in one second will travel four meters in two  seconds, nine meters in three seconds, and sixteen meters in four  seconds,   etc.[16]  (4) The total amount of force in the world is conserved both locally  and globally with the result that there is always as much force in a  cause as in its effect.