Question: A ball rolls of the top of a stair way with a horizontal velocity π’ ms β1 . If the steps are β metre and π metre wide, the ball hits the edge of πth step, the time taken by the ball is
(A) \dfrac{hu}{gb}
(B) \dfrac{2hu}{gb}
(C) \dfrac{2hu^{2}}{gb}
(D) \dfrac{hu^{2}}{2gb}
Answer: option (B)
Solution:
