A0.50 kg billard ball moving at 1.5 m/s strikes a second 0.50 kg billiard ball which is at rest on the table. if the first ball slows down to a speed of 0.10 m/s, then what is the speed of the second ball ? explain.

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.