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小轮子说动滑轮可以省力,按照它教的办法做,能省一半力。10千克的物体,让人提起来感觉好像只有5千克。动滑轮真的这么给力?你信吗?不管你信不信,咱们都应该本着科学的态度亲自验证一下,毕竟耳听为虚,眼见为实嘛。你需要:两个小夹子★,一只小篮子(或类似的东西),一段线,一把椅子,一听罐头(积木或玩具也行,只要稍重些的就可以)。第一步:在椅背上和篮子提手上分别夹一个小夹子。第二步:把线系在篮子提手上的小夹子上,然后从椅子上的小夹子中穿出来。这样就做成了一个定滑轮。
Small wheels that move the pulley can be labor-saving, in accordance with its teachings to do, can save half the force. 10 kilograms of objects, people feel like it is only 5 kg. Believe it or not, you believe it? Believe it or not, we should personally verify in a scientific manner, after all, I am not convinced, seeing is believing. You need: two small clips ★, a small basket (or something), a stretch of lines, a chair, a can of canned food (building blocks or toys, just a little heavier). The first step: a small clip on the back of the chair and basket handle. Step 2: Tie the thread to the small clip on the basket handle and then it out through the small clip on the chair. This made a fixed pulley.