we neglect the air resistance acting on the balloon of a volley-ball .A player hits the baloon that is situated at point A and throws it with velocity v0 of magnitude 15m/s making an angle 20(degree) with horizontal. The point A is at a height of H=3m from the ground the net is at D=12m from the player ,the height of the net is H=2.4m. 1)show that the service succeeds 2)A player situated at 2m from the net wants to intercept the balloon. at which height H should he put his hands in the plane of the trajectory of the balloon

Review multiple-concept example 7 in this chapter as an aid in solving this problem. in a fast-pitch softball game the pitcher is impressive to watch, as she delivers a pitch by rapidly whirling her arm around so that the ball in her hand moves in a circle. in one instance, the radius of the circle is 0.626 m. at one point on this circle, the ball has an angular acceleration of 66.1 rad/s2 and an angular speed of 12.6 rad/s. (a) find the magnitude of the total acceleration (centripetal plus tangential) of the ball. (b) determine the angle of the total acceleration relative to the radial direction.