If an airplane were traveling eastward with a thrust force 450 n and there was a tailwind of 200 n, what would the resulting net force be on the airplane?

You throw a small rock straight up from the edge of a highway bridge that crosses a river. the rock passes you on its way down, 7.00 s after it was thrown. what is the speed of the rock just before it reaches the water 28.0 m below the point where the rock left your hand? ignore air resistance.