1. A DC-8 flying horizontally at an altitude of 20km at a speed of 250m/s
drops an engine.
a. How long after it falls does it take the engine to hit the ground?
b. How far horizontally has the engine traveled when it hits?
2. An arrow is fired at 53° with a velocity of 15m/s.
a. How long is it in the air?
b. What is its range?
