일반물리학 1 · Motion Along a Straight Line · Problem 47
일반물리학 1 — Motion Along a Straight Line: Problem 47
47 A hot-air balloon is ascending at a rate of 14 m/s at a height of 98 m above the ground when a packet is dropped from it. (a) With what speed does the packet reach the ground, and (b) how much time does the fall take?
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