일반물리학 1 — Rolling, Torque, and Angular Momentum: Problem 9

9 In Fig. 11-26, a solid ball rolls smoothly from rest (starting at height $H = 6.0\text{ m}$) until it leaves the horizontal section at the end of the track, at height $h = 2.0\text{ m}$. How far horizontally from point $A$ does the ball hit the floor?