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题1 (2002年重庆市初中物理知识竞赛初二组复赛试题)图中O点是兔子的洞,兔子在离洞口100米远处的草地上(图中B点)吃草.与兔子相距s米处有一只狼(图中A点)突然向兔子扑过来.同时兔子也向洞口逃去.如果OAB三点在同一直线上,已知狼的步子长,狼跑2步的距离相当于兔子跑7步,而兔子的腿运动快,兔子跑5步的时间,狼只能跑3步.请通过计算说明,在什么条件下兔子能躲进洞内而不被狼捉住? 分析:该题中兔子离洞口为100米,狼离兔子AB为s米,狼向兔子扑过去的同时,兔子也
Question 1 (Review of the junior high school physics contest in Chongqing in 2002) The point O is the rabbit’s hole and the rabbit grazes on the grass 100 meters away from the entrance (point B in the figure). There is a wolf at the meter (point A in the figure) suddenly rushed toward the rabbit. At the same time, the rabbit also fled to the hole. If the OAB three points in the same straight line, known wolf’s step is long, the wolf runs 2 steps is equivalent to the rabbit Running 7 steps, and the rabbit’s legs are moving fast, the rabbit runs 5 steps, the wolf can only run 3 steps. Please explain by calculation, under what conditions the rabbit can hide in the cave and not be caught by the wolf? Analysis: The rabbit in the title is 100 meters away from the entrance, the wolf is s meters from the rabbit AB, and the wolf pounces on the rabbit while the rabbit is also