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题某人在距平直公路40m 的 B 处发现公路上有一辆汽车以10m/s 的速度从 A 处沿AC 方向匀速行驶,A 与人相距100m,如图1所示,问此人至少要以多大的速度沿什么方向奔
A person at a distance of 40m from the straight road found a car on the road running at a speed of 10m/s from A at a constant speed in AC direction. A is 100m away from people, as shown in Fig. 1. Ask the person at least At what speed in what direction