When a ball is thrown up at maximum height, it has zero velocity, although it will have constant acceleration due to gravity, which is equal to 9.8 m/s2.
In this phenomenon how does the ball has zero velocity ?
Yes! When a ball is projected vertically upward, it has an acceleration āgā throughout its journey. At the maximum height the kinetic energy of the ball becomes zero and all its energy is potential energy. So, at the maximum height the velocity of the ball is zero.