由于我们看不见重力,所以我们要通过一些物理现象来观察、体会重力的存在。到底地球是怎样吸引物体的呢?我们来做一个有趣的实验模拟一下:你需要:笔记本和铅笔,两本同样大小的书和一本比较薄的书,一把尺子,一块强力磁铁,一个薄一点儿的文件夹,小金属块儿(螺丝帽,小钢珠),线。第一步:把两本书平放在 Since we can not see the gravity, we must observe and experience the existence of gravity through some physical phenomena. In the end how the Earth attracts objects? Let’s take a fun experiment to simulate what you need: notebooks and pencils, two books of the same size and a thinner book, a ruler, a powerful magnet, a thin A little folder, small pieces of metal children (screw cap, small ball), line. The first step: Put two books flat on