Question: A ball rolls off the top of a stairway with horizontal velocity 𝑣0𝑚𝑠 −1. If the steps are ℎ meter high and 𝑤 meter wide, the ball will hit the edge of 𝑛 th step if
(A) n=\dfrac{2hV_{0}}{gw^{2}}
(B) n=\dfrac{2hv_{0}^{2}}{gw }
(C) n=\dfrac{hv_{0}^{2}}{gw^{2}}
(D) n=\dfrac{2hv_{0}^{2}}{gw^{2} }
Answer: option (D)
Solution:
