A ball is thrown vertically upward from the floor at point 0 with an initial velocity v = 15 m/s. What is the velocity of the ball just before it hits the ceiling 11 m above the floor? (Neglect the effect of air resistance, and use g = 10 m/s²).​

A ball is thrown vertically upward from the floor at point 0 with an initial velocity v 15 ms What is the velocity of the ball just before it hits the ceiling 1 class=