A 5 kg ball is dropped from a height of 12.8 m above one end of uniform bar that pivots at its center. The bar has mass 7.5 kg and is 4 m in length. At the other ned of the bar sits another 5 kg ball, unattached to the bar. The dropped ball sticks to the bar after the collision. How height will the other ball go after the collision ?

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.