A ball rolls off the top of a stair way with a horizontal velocity u m/s. If the steps are h metres high and b metres wide, then ball will hit the edge of the nth step, if

\[n=\frac{2h{{u}^{2}}}{g{{b}^{2}}}\]

\[n=\frac{2{{b}^{2}}}{2h{{u}^{2}}}\]

A ball rolls off the top of a stair way with a horizontal velocity u m

1.	A ball rolls off the top of a stair way with a horizontal velocity u m/s. If the steps are h metres high and b metres wide, then ball will hit the edge of the nth step, if
A.	\[n=\frac{2h{{u}^{2}}}{g{{b}^{2}}}\]
B.	\[n=\frac{2hu}{g{{b}^{2}}}\]
C.	\[n=\frac{2{{b}^{2}}}{2h{{u}^{2}}}\]
D.	\[n=\frac{g{{b}^{2}}}{2hu}\]
Answer» B. \[n=\frac{2hu}{g{{b}^{2}}}\]

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A ball rolls off the top of a stair way with a horizontal velocity u m/s. If the steps are h metres high and b metres wide, then ball will hit the edge of the nth step, if

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