A stone, initially at rest, is dropped from the roof of a building. After 2.00 second it is dropped, a second stone is thrown straight down with an initial speed of 25 m/s. The two stones hit the ground at the equal time.
a) Determine how long did it take the first stone to reach the ground?
b) Determine how high is the building?
c) Determine the speeds of the two stones just before they hit the ground?