You might drop the object from a measured height, h, and use the stopwatch to record the time it takes the object to fall that distance.
(You; might drop; the object; from a measured height, h) (the object; to fall; that distance) (You; use; the stopwatch; to record the time)
You the object You
might drop to fall use
the object from a measured height, h
that distance
the stopwatch to record the time