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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. \[n=\frac{2hu}{g{{b}^{2}}}\] | |