When a ballplayer throws a ball straight up, by how much does the speed of the ball decrease each second while ascending? In the absence of air resistance, by how much does it increase each second while descending? How much time is required for rising compared to falling?

Solution 29E Part 1 Now when the ball is moving upwards, the acceleration is in the opposite direction. So the speed will 2 decrease. Now the acceleration due to gravity is 9.8 m/s . So in each second the speed of the ball will decrease by 9.8 m/s. Part 2 While descending, the direction of the velocity and the acceleration are same. Hence the velocity of the ball will increase. Since the acceleration of the ball is same, that is, 9.8...