Q. A soccer player kicks a rock horizontally off a cliff 38.5 m high into a pool of water. If the player hears the sound of the splash 3.20 s later, what was the initial speed given to the rock? Assume the speed of sound in air to be 343 m/s.
Q. A light plane is headed due south with a speed of 154 km/h relative to still air. After 1.06 hour, the pilot notices that they have covered only 127 km and their direction is not south but southeast (45.0^circ).