两个同样的瓶子一个装沙一个装水,在同一个倾斜度哪个先滚下去,为什么?

来源:学生作业帮助网 编辑:六六作业网 时间:2024/12/23 16:39:30
两个同样的瓶子一个装沙一个装水,在同一个倾斜度哪个先滚下去,为什么?两个同样的瓶子一个装沙一个装水,在同一个倾斜度哪个先滚下去,为什么?两个同样的瓶子一个装沙一个装水,在同一个倾斜度哪个先滚下去,为什

两个同样的瓶子一个装沙一个装水,在同一个倾斜度哪个先滚下去,为什么?
两个同样的瓶子一个装沙一个装水,在同一个倾斜度哪个先滚下去,为什么?

两个同样的瓶子一个装沙一个装水,在同一个倾斜度哪个先滚下去,为什么?
装沙子的先滚下去
这个主要跟物体的惯性有关
沙子是固体,当装沙子的瓶子朝斜面往下滚的时候,沙子随着瓶子一起滚动
而水是液体,当装水的瓶子沿斜面下滚的时候,由于水具有惯性,它并不会随着瓶子滚动(这种例子非常多,比如杯子总装水后,转动杯子,会发现其中的水刚开始并不会随着杯子一起转动),因此水的作用实际上是阻碍了瓶子的转动,因此,装水的杯子应该后滚下去

不对 应该是水的先滚!因为用沙子的话沙子因为是固体所以他的滚动也消耗能量,而水瓶的话想滚动不需要水也滚,所以需求能量少!当然就先滚啦

基本同时,滚动摩擦力很小,可以忽略不计

cvkkkkkkkkkkkkkkkkkkkkkkkkkkkkkvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv...

全部展开

cvkkkkkkkkkkkkkkkkkkkkkkkkkkkkkvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvfvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv

收起

两个同样的瓶子一个装沙一个装水,在同一个倾斜度哪个先滚下去 两个同样的瓶子一个装沙一个装水,在同一个倾斜度哪个先滚下去,为什么? 一个瓶子装满水,另一个瓶子装满沙,哪个瓶子先到达坡底将两本书叠起来,把木板放在书上,另一端放在桌之上.取两个同样的瓶子,分别装入等体积的水和沙子.把这两个瓶子反倒在斜坡上端,让 水和油的重量一个瓶子可以装一斤水.同样的瓶子可以装多重的油? 有两个瓶子 一个装水 一个装沙子 沙子和水的重量一样 把两个瓶子放在斜坡上 谁滚 在两个相同的瓶子中加入同样多的水和同样多的洗洁精,为什么装水的瓶子滚得快些? 为什么在两个同样的瓶子里倒同样的水,一个冻成冰,另一个不冻,冰的面积比水多 用长方形木板和两本书搭成一个斜坡.将水倒入一个瓶子,将沙子倒入另一个瓶子中.把两个瓶子放入木板上在同一个高度让两个瓶子同时向下滚 那个瓶子先到终点,重量相同的沙子和水. 一个装水和半瓶一个装半瓶沙的两个完全相同的矿泉水瓶,放在同一个的斜面上滑,那个滑的快? 两个完全相同的矿泉水瓶,一个装沙,一个装水,放在同一斜面上滑下,哪个瓶子滚得比较快 两个完全相同的玻璃瓶,一个装沙,一个装满水,放在同一斜坡上滚下,那个瓶子滚得更快些?为什么? 有两个同样形状,同样大小的矿泉水瓶,一个是空瓶,一个是盛有半瓶水的,立放在桌子上,哪个瓶子不容易倒.为什么?请说出科学道理。 2个完全一样的玻璃瓶,一个装满水,另一个装满沙,放在同一个斜面上滑下,哪个瓶子滚得快?为什么? 同一个蜂箱取的蜂蜜 用2个瓶子装的 为什么一个瓶子里的全部凝固了 另外个一半液态一半固态 不同中药可以用同一个瓶子装吗我有一个装新清宁片的瓶子 倒掉里面的药洗过以后可以装其他药吗 两个完全相同的矿泉水瓶,一个装半瓶沙,另一个装半瓶水,放在同一斜坡上滑下,哪个瓶子滚得比较快?要说出为什么!谢咯! 两个完全相同的瓶子一个装半瓶沙子,一个装半瓶水,放在同一斜面滑下,哪个滚得快 两个矿泉水瓶,一个装沙,一个装水,质量相同,放在斜面上滚下,哪个瓶子滚得快沙和水都没装满,同一斜面.