An object falling from rest in air is subject not only to the gravitational force but also to air resistance. Assume that the air resistance is proportional to the velocity 

with constant of proportionality as k > 0, and acts in a direction opposite to motion (g = 9.8 m/s^2). If the velocity cannot exceed A m/s, what can be the value of 10 Ak?

K = 9.8 / A

So 10 A k = 98