A ball travels from north to south at 60km/h. After being hit by a bat, it travels from west to east at 60km/h. Is there a change in velocity?

Anybody wanna ? (picture included? )

Which situation will produce the greatest change of momentum

At a certain instant after jumping from the airplane a, a skydiver b is in the position shown and has reached a terminal (constant) speed vb = 52 m/s. the airplane has the same constant speed va = 52 m/s, and after a period of level flight is just beginning to follow the circular path shown of radius ρa = 2330 m. (a) determine the velocity and acceleration of the airplane relative to the skydiver. (b) determine the time rate of change of the speed vr of the airplane and the radius of curvature ρr of its path, both as observed by the nonrotating skydiver.