On this account, the creation and annihilation of the universe (thus the total quantity of motion going from zero in the mind of God to a positive value, and thereafter returning to zero) at the times ordained for it is not incompatible with the immutability of God's will.
Again, for Descartes, unlike Aquinas, there cannot be a range of possible numerical values of the total quantity of motion in the divine mind, from which God then actualizes one value at a given time according to the order of God's providential wisdom.
Along these lines, in a similar way to the link between the Newtonian force and momentum, the former being the time rate of change of the latter, I argue that vis viva is actually a quantity of motion and power, its time rate of change, is the cause of motion.