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.

answer; how far out of place which the object finished relative to the starting location;

it's when something is going so fast it makes a loud noise, breaking the sound barrier, for example: a jet makes a loud noise, not only cause of the jet but because they reached a point where they went so fast that you can year the noise from various parts, kinda like a police car, lets say the car was going   so fast that you hear the siren of the cop car right next to you, but the car is probably a mile a way, it's cos the siren was next to you a few seconds if you understand me