Are you sure you want to delete this answer? The total time represents the time to fall plus the time for the sound to travel back up: Draw a picture first.
This should form a triangle from the plane straight down to the ground, up the hill, and then back horizontally to the plane.
You already know one of the legs and from trig you can find out one of the angles. From that information you find out that horizontal part of the traingle which is the distance the pilot will fly before he hits the ground. I answered one like this earlier AP Physics C homework help? AP Physics homework help with basics? AP Physics Question not homework help?
Answer Questions A The cables have no mass of their own. There is also an errata sheet available for some courses if you select "Launch a Full Course.
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