我们利用转轴灵活的学生实验用小车,稍加改装制成简易磁力小车。用作研究两个物体的相互作用等定性演示,演示课前准备简单,效果直观、明显,特介绍如下: 材料:现成小车两辆,与小车横截面积相同(或略高些)的 We use the flexible student experimental car with shafts, and make a simple refit to a simple magnetic car. Used as a qualitative demonstration of the interaction between two objects. It is simple to demonstrate before class and the effect is intuitive and obvious. It is specifically introduced as follows: Materials: Two ready-made carts with the same (or slightly higher) cross-sectional area of ​​the cart.