What ranges from 11,000 meters below sea level to 15,000
meters above sea level?

You've already seen the value of 9.8 in this lesson. what's this value called? what quantity does it represent?

What happens when you slowly pulled the carboard?

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.