The word "dropped" means that the bag is in free fall and that its initial velocity is zero. In a free-falling body, the value of the final velocity is obtained through the equation,
Vf = gt
where g is the acceleration due to gravity, 9.8 m/s².
Substituting,
Vf = (9.8 m/s²)(2 s) = 19.6 m/s
Therefore, the bag's velocity is 19.6 m/s.
