问题
问答题
如今的城市高楼林立,有些不遵守公共道德的居民,经常把垃圾类的物体从楼上往下抛,从而造成严重伤人事件.请你从物理角度说明为什么不能“高空抛物”.
答案
物体所处的高度越高,所具有的重力势能就越大,向下运动的过程中,速度会越来越快,转化成的动能就越大,
对人体的伤害就越大,所以说不能“高空抛物”.
如今的城市高楼林立,有些不遵守公共道德的居民,经常把垃圾类的物体从楼上往下抛,从而造成严重伤人事件.请你从物理角度说明为什么不能“高空抛物”.
物体所处的高度越高,所具有的重力势能就越大,向下运动的过程中,速度会越来越快,转化成的动能就越大,
对人体的伤害就越大,所以说不能“高空抛物”.
根据框中的单词填空。 | |
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1. Boys get at a large age than girls. 2. He does poorly at school so his mother is it. 3. There is a big tree the house and we feel really cool because of it. 4. People use to carry things to different places in the desert. 5. To , he often goes to the gym to work out. 6. Li Ping can speak several foreign besides English. 7. Do you know that there are five on the flag of the Olympics? |