6. A water bomber flying with a horizontal speed of 85 m/s at a height of 3000 m drops a load on a fire below. How far in front of the target fire should the load be released? 7. A cliff diver wishes to clear some rocks extending 4.0 m from the base of a 20 m high cliff. What is the lowest horizontal velocity that she could safely leap from the cliff ? 8. You are exploring a newly discovered cave in the Andes in South America . Peering over the edge of a cliff in the cave , you can't see the bottom . Wondering if you have enough rope to rappel to the ground , you drop a rock off the top , and hear the sound of it hitting the bottom 4.2 seconds later . Find the height of the cliff ignoring the time that the sound takes to travel back to you from the bottom. Show all work as done in lessons. 9. 0.30 s after seeing a puff of smoke rise from the starter's pistol , the sound of the firing of the pistol is heard by the track timer 100 m away . What is the velocity of sound ? Hint : treat the speed of light as instantaneous 10. A boy throws a rock straight up into the air. Explain the changes taking place through the flight in terms of velocity and acceleration