徐州市91年物理竞赛辅导有这样一道题:一只狼沿半径为 R 的圆形岛边缘按逆时针方向匀速跑动,如图1所示,当狼经过 A 点时,一只猎犬以相同速率从圆心O点出发追击狼。设追击过程中,狼、犬和 O 点在任一瞬时均在同一直线上,问猎犬沿什么轨迹运动?在何处追击上。 Xuzhou’s 91st physics coaching program had this question: A wolf ran at a constant speed counterclockwise along the edge of a circular island of radius R. As shown in Figure 1, when a wolf passed A, one of the hounds was the same. The speed starts from the center O point to pursue the wolf. In the pursuit process, the wolf, the dog, and the O-point are all on the same line at any instant, and ask the retriever what trajectory to follow and where to pursue it.