일반물리학 1 · Motion Along a Straight Line · Problem 49
일반물리학 1 — Motion Along a Straight Line: Problem 49
49 A hot-air balloon is ascending at the rate of 12 m/s and is 80 m above the ground when a package is dropped over the side. (a) How long does the package take to reach the ground? (b) With what speed does it hit the ground?
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