1. The ball was thrown parallel to the ground from a height of h = 20 m at a speed of v= 20 m/s, and it bounced as shown in the picture. After colliding with the floor at A, the ball bounces at the same angle 6 as before the collision, but its speed is reduced by half compared to just before the collision. However, air resistance is ignored. (1) Find the angle 8 using the speed of the ball just hefore it collides with the floor at A. (2) Find the distance from O to B. (3) How much time does it take for the ball to go from O to B? 'IT" v = 20 m."S