Two objects A and B of mass 2 kg and 3 kg, respectively, were dropped from different heights. A took 5 seconds and B took 3 seconds to touch the ground. What is the ratio of their kinetic energy with which they hit the ground?
\( \frac{10}{9} \)
\( \frac{2}{3} \)
\( \frac{50}{27} \)
\( \frac{5}{3} \)