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阿Q吧 > 一把刻度准确的杆秤，秤砣因长期使用磨损变轻，现用其称大白菜质量时的示数将（　　）A．比物体的实际质

一把刻度准确的杆秤，秤砣因长期使用磨损变轻，现用其称大白菜质量时的示数将（　　）A．比物体的实际质

2025-03-15 01:48:14

推荐回答（1个）

回答1：

刻度准确的杆秤它就是利用杠杆的原理来工作的，杆秤上所挂的物体对杠杆的力如果视为动力，则秤砣对杆秤的力为阻力，由杠杆的平衡条件可知，力与相应的力臂是成反比关系，故秤砣由于磨损变轻时，秤砣对应的力臂变大，读的示数偏大．
故选A．

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