A man standing on the roof of a house of height $h$ throws one particle vertically downwards and another particle horizontally with the same velocity $u$. The ratio of their velocities when they reach the earth's surface will be
A man standing on the roof of a house of height $h$ throws one particle vertically downwards and another particle horizontally with the same velocity $u$. The ratio of their velocities when they reach the earth's surface will be
- A
$\sqrt {2gh + {u^2}} :u$
- B
$1:2$
- C
$1:1$
- D
$\sqrt {2gh + {u^2}} :\sqrt {2gh} $
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