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> 在“探究弹力与弹簧伸长量的关系”试验中，根据实验数据在图中画出了a、b、c、d四个坐标点. (1) 根据a、b、c、d四个坐标点，画出△L-F图线（2）由图线，若弹簧原长50cm，要使弹簧伸长到75cm（弹簧仍在弹性限度内），需要的拉力为 N.

问题：

发布时间：2024-09-09

在“探究弹力与弹簧伸长量的关系”试验中，根据实验数据在图中画出了a、b、c、d四个坐标点.

(1) 根据a、b、c、d四个坐标点，画出△L-F图线
（2）由图线，若弹簧原长50cm，要使弹簧伸长到75cm（弹簧仍在弹性限度内），需要的拉力为 N.

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