1. A freely falling object requires 1.90 s to travel the last 22.0 m before it hits the ground. From what height above the ground did it fall?
2. An attacker at the base of a castle wall 3.97 m high throws a rock straight up with speed 6.00 m/s at a height of 1.45 m above the ground.
a) If the rock will reach the top, what is its speed? If it will not, what initial speed should it have to reach the top?
b) Discover the change in speed of a rock thrown straight down from the top of the wall at an initial speed of 6.00 m/s and moving among the same two points