Answer:
t = 3.1 seconds
Explanation:
Given that,
A baseball dropped from the roof of a 47 meter building.
Let t is the time taken by the baseball to free-fall of the top of the building. It can be calculated using second equation of motion as follows :
[tex]s=ut+\dfrac{1}{2}at^2[/tex]
Here, u = 0 and a = g
[tex]s=\dfrac{1}{2}gt^2\\\\t=\sqrt{\dfrac{2s}{g}} \\\\t=\sqrt{\dfrac{2\times 47}{9.8}} \\\\t=3.09\ s[/tex]
or
t = 3.1 s
So, it will take 3.1 seconds to free-fall of the top of the building.
