14. A ball is projected upward at time t = 0.0 s from a point on a roof 90 m ab

14. A ball is projected upward at time t = 0.0 s from a point on a roof 90 m above the ground. The ball rises, then falls and strikes the ground. The initial velocity of the ball is 80.5m/s The velocity of the ball when it is 89m above the ground is about