Sam heaves a shot with weight 16-lb straight upward, giving it a constant upward acceleration from rest of 45.5m/s2 for a height 63.0cm. He releases it at height 2.10m above the ground. You may ignore air resistance.
What is the speed of the shot when he releases it?
How High above the ground does it go?
How much time does he have to get out of the way before it returns to the height of the top of his head, 1.9m above the ground?