You throw a ball straight up froma roof of a building. The ball leaves your hand at a point even with the roof railing with an upward speed of 15m/s. The ball is then in free fall. On its way back down, it just misses the railing. After 6.0s from release, the ball then hits the ground. What is the velocity of the ball upon impact on the ground? O 198.5m/s O -198.5m/s O 352m/s -352m/s
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