I am not following: how can the middle leg support a man of M when

I am not following: how can the middle leg support a man of M when

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送交者: chouqilozi 于 2010-01-07, 13:33:25:

回答: If the middle leg is supporting the weight of a man 由 gyro 于 2010-01-07, 11:53:28:

he sits at one end?

There might be a heavier person at the other end (无内容) - gyro (0 bytes) 2010-01-07, 14:50:55 (401950)
- 题目讲的是仅有自重。实际情况应该是这样的： - JFF (310 bytes) 2010-01-07, 15:35:19 (401961)