题目
以24米/秒的初速度从地面上竖直上抛一物体,上升的最大高度为24米,则在运动过程中,动能和势能相等的高度在距离出发点多远处?
提问时间:2020-12-26
答案
如果空气阻力一定 g=10m/s^2: 上升过程中动能和势能相等的高度在距离出发点144/11米 下降过程中动能和势能相等的高度在距离出发点124/11米0.5m(24)^2=24mg+24f=288mf=2m上升:0.5mv^2=mgx=288m-mgx-2mxx=144/11下降...
举一反三
我想写一篇关于奥巴马的演讲的文章,写哪一篇好呢?为什么好
奥巴马演讲不用看稿子.为什么中国领导演讲要看?
想找英语初三上学期的首字母填空练习……
英语翻译
1,人们染上烟瘾,最终因吸烟使自己丧命.
最新试题
- 1在商城大厦门前修建一个直径8米,深1.8米的圆柱形喷水池.在水池周围和底面抹上一层水泥,抹水泥部分的面积是多少平方米?
- 2this book is ___ interesting ___ that one
- 38.There is a fully ______ health center on the ground floor of the main office building.A.installed
- 4秦惠文王为什么要***商鞅
- 5奥数教程六年级第14讲的练习题第三道怎么做
- 6actions speak louder than words.what is the meaning of the sentence
- 7必修一化学BB题
- 8I think you very nice
- 9大麦和小麦的区别是什么?都是磨成面粉的吗?
- 10英语翻译
热门考点
- 1张先生向银行贷款8万元,月利率1.2%,借期五个月,到期他应还银行()万元
- 2组合数的不等式
- 3碳酸根离子的检验方法
- 4请识别句子的关系,像递进之类的
- 5We have many old coins of this kind and the rest _____ you.
- 6调查问卷中,这几种对多选题的百分比统计,哪个更合理?
- 7-----they arrived early at the airport,they nearly missed their flight
- 8_____ more slowly,please.用 say,speak,tell还是 talk
- 9What club does her uncle want to joining?My grandfather speaks English very good.
- 10put some tea leaves into the