A ball is thrown straight up from the edge of the roof of a
building. A second ball is dropped from the roof a time of 1.20 s
later. You may ignore air resistance.
A) If the height of the building is 20.7 m , what must the
initial speed be of the first ball if both are to hit the ground at
the same time?
B) Consider the same situation, but now let the initial speed
v0 of the...