3. Austin Luce has found an unusual way to measure the height of the school building. He throws a baseball from the top of the building with a horizontal velocity of 8 m/sec. The ball
lands 45 m from the base of the building. Calculate the height of the school building.

Two cannon balls weighing 18 kg and 24 kg are chained together and fired horizontally with a velocity of 165 m/s from the top of a 21-m wall. the chain breaks during the flight of the cannonballs and the 18-kg cannonball strikes the ground at t = 1.5 s, at a distance of 240 m from the foot of the wall, and 7 m to the right of the line of fire. determine the position of the other cannonball at that instant. neglect the resistance of the air.