posted by kev .
A 4.55 kg object is released from rest while fully submerged in a liquid. The liquid displaced by the submerged object has a mass of 3.20 kg. How far and in what direction does the object move in 0.200 s, assuming that it moves freely and that the drag force on it from the liquid is negligible?
The object will sink, since the buoyancy force is less than its weight.
The net downward force is
(4.55-3.20)g = 12.25 N
Use Fnet = M*a for the acceleration, a.
a = 12.25/4.55 = 2.69 m/s^2