A Ball Rolls Over the Edge of a Platform with Only

Multiple Choice

A ball rolls over the edge of a platform with only a horizontal velocity.The height of the platform is 1.6 m and the horizontal range of the ball from the base of the platform is 20 m.What is the horizontal velocity of the ball just before it touches the ground? Neglect air.

A) 35 m/s
B) 9.8 m/s
C) 20 m/s
D) 4.9 m/s
E) 70 m/s