Identical items, object 1 and object 2, are dropped from the top of a 50-m building. Object 1 is dropped with an initial velocity of 0 m/s, while object 2 is thrown straight downward with an initial velocity of 13 m/s. What is the difference in time for both objects to reach the ground?
a) 1.47 s
b) 2.67 s
c) 3.86 s
d) 5.02 s