Two objects are dropped at the same time from heights of 0.49 m and 1.27 m. how long after the first object hits the ground does the second object hit the ground?

After 0.19288 sec second object hit the ground after hitting first object    

Explanation:

We have given two objects are dropped from at the same time from height 0.49 m and 1.27 m

As the object is dropped so its initial velocity will be zero u = 0 m/sec

For object 1 height h = 0.49 m

From second equation of motion

t = 0.31622 sec

For second object

t = 0.5091 sec

So difference in time = 0.5091-0.31622 = 0.19288 sec

So after 0.19288 sec second object hit the ground after hitting first object