As such, all objects free fall at the same rate regardless of their mass. Because the 9.8 N/kg gravitational field at Earth's surface causes a 9.8 m/s/s acceleration of any object placed there, we often call this ratio the acceleration of gravity.

Will 2 objects of different weight fall at the same speed?

Heavier things have a greater gravitational force AND heavier things have a lower acceleration. It turns out that these two effects exactly cancel to make falling objects have the same acceleration regardless of mass.

Do objects fall at the same speed in water?

(*) When there is no gravity, there are no buoyant forces. Thus the situations of separated ball-and-liquid pairs, separated balls, separated liquids, two balls of different densities immersed in same liquid, etc. all behave the same way in terms of downward motion. The balls and liquid fall at the same rate.