In Figure a, a sled moves in the negative x direction at constant speed u, while a ball of ice is shot from the sled with a velocity v0 = v0xi + v0yj relative to the sled. When the ball lands, its horizontal displacement ??xbg relative to the ground (from its launch position to its landing position) is measured Figure b gives ??xbg as a function of vs. Assume the ball lands at approximately its launch height. What are the values of?

(a) v0x, and

(b) v0y? The ball's displacement ??xbs, relative to the sled can also be measured. Assume that the sled's velocity is not changed when the ball is shot. What is ??xbs, when u, is

(c) 5.0 m/s and

(d) 15 m/s

40 Ball Sled 10 20 (a) -40 , (m/s) (b) (u) xv