A baseball is hit straight up at an initial velocity of 150 m/s. What will be the baseball's speed when it hits the ground?

Assuming that the ball is launch from the ground. the initial velocity would be equal to its final velocity when it reach the ground. this is because the acceleration due to gravity is working on the ball, when it goes up decelerates up to zero, then falls back then acceleartes again until it reach the groun, where the velocity is 150 m/s