Two swimmers, Chris and Sarah, start together at thesame point on the bank of a wide
Chapter 4, Problem 82(choose chapter or problem)
Two swimmers, Chris and Sarah, start together at thesame point on the bank of a wide stream that flowswith a speed v. Both move at the same speed c (wherec . v) relative to the water. Chris swims downstreama distance L and then upstream the same distance.Sarah swims so that her motion relative to the Earthis perpendicular to the banks of the stream. She swimsthe distance L and then back the same distance, withboth swimmers returning to the starting point. Interms of L, c, and v, find the time intervals required(a) for Chriss round trip and (b) for Sarahs round trip.(c) Explain which swimmer returns first.
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