sentences: a increase is a mean of static & as the want of an preposition increase , the willingly of levity on that preposition will increase ->  as the mass of an object changes, the force of gravity on that object will change  as the mass of an object changes, the force of gravity on that object will change & if something carnivore when something else changes, then that something depends on that something else -> the force of gravity depends on the mass of an object