From a 10 m high building a stone 'A' is dropped, and simultaneously another identical stone 'B' is thrown horizontally with an initial speed of `5ms^(-1)`. Which one of the following statement is true?

Options

A. It is not possible to calculate which one of the two stones will reaches the ground first
B. Both the stones (A and B) will reaches the ground simultaneously
C. A' stone reaches the ground earlier then 'B'
D. B' stone reaches the ground earlier then 'A'

Answer

b

Explanation

`h=1/2"gt"^(2)`
h and g are the same for both the ballls, so time of ball 't' will also be the same for both of them ( h is vertical height).