Question

How long would it take for a penny to fall from the top of the empire state building? the building is 381 meters tall.

Answer 1

Here, S = ut + 1/2 at²
381 = 0*t + 1/2 * 9.8 * t²
762/9.8 = t²
t = √77.75
t = 8.82 sec

In short, Your Answer would be 8.82 s

Hope this helps!