By following the same line of reasoning we used to determine the relationship between the amount of force and the speed, we can determine the relationship between the amount of force and the radius.
(we; to determine; the relationship between the amount of force and the speed) (we; can determine; the relationship between the amount of force and the radius)
we we
to determine can determine
the relationship between the amount of force and the speed
the relationship between the amount of force and the radius