I would appreciate it if someone could help me with the following problem. A ball is thrown at an angle of 45 degrees at a speed of 40m/s. Each time it bounces, it loses 75% of its speed. How far does it travel before it stops? What I don't understand is that because it only loses 75% of its speed, doesn't that mean it never stops? If someone could explain a solution to me, I'd be grateful.