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1996年全国初中物理竞赛有一个用杆秤测质量的问题.原题如下:为保证市场的公平交易,我国已有不少地区禁止在市场上使用杆秤.杆秤确实容易为不法商贩坑骗顾客提供可乘之机.请看下例.
In 1996, the national junior high school physics competition had a problem of measuring the quality with a rod scale. The original question is as follows: In order to ensure the fair trade in the market, many regions in China have banned the use of steelyard scales in the market. The steelyard scales are indeed easy to provide unscrupulous trader pits to customers. The machine. Please see the following example.