有4根长为1的木板(宽度、厚度不记),在一条河上架桥,河宽不能超过多少?
注意:木板是有重量的,情况理想化。
考虑摩擦力,3.999米 否则1.5米 注此桥严禁任何质量>0 物体通过 |
At most 12/7. It is larger than 1.5 given by math 59. |
If the wooden board and the river bank are hard enough, theoretically, the length of the bridge (similar to a Chinese stone arch bridge) may be any positive number less than 4 such as 3.999 that math59 mentioned. |
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