A ball is dropped from rest from the top of a tower 80\,m high. At the same instant, a second ball is thrown vertically upward from the foot of the tower with a speed of 30\,m\,s−1. Neglect air resistance.
(a) Calculate the time after which the two balls meet.
(b) Determine the height above the ground at which the meeting occurs.
a. (a) Time of meeting of the two balls
b. (b) Height of meeting above ground