Without air resistance, every falling object has 9.8 m/s² of acceleration,
from the instant it starts falling until it hits the bottom.
None of these things makes any difference:
-- whether you throw the object up, throw it down, or just drop it
-- any horizontal speed it has
-- how much mass the object has
-- how heavy it is
-- what color the object is
-- how far it falls
-- how long it takes.
