Acement block accidentally falls from rest from the ledge of a 54.1-m-high building. When the block is 16.4 m above the ground, a man, 2.10 m tall, looks up and notices that the block is directly above him. How much time, at most, does the man have to get out of the way? Number I Units Hi While standing on a bridge 12.9 m above the ground, you drop a stone from rest. When the stone has fallen 3.50 m, you throw a second stone straight down. What initial velocity must you give the second stone if they are both to reach the ground at the same instant? Take the downward direction to be the negative direction. Number I Units Hi A roof tile falls from rest from the top of a building. An observer inside the building notices that it takes 0.23 s for the tile to pass her window, which has a height of 1.50 m. How far above the top of this window is the roof? Number I Units i 6' eTextbook and Media