安徽省2023届第二学期九年级作业辅导练习英语试卷 答案(更新中)

安徽省2023届第二学期九年级作业辅导练习英语试卷 答案(更新中)，目前全国100所名校答案网已经汇总了安徽省2023届第二学期九年级作业辅导练习英语试卷 答案(更新中)的各科答案和试卷，更多全国100所名校答案请关注本网站。

Dear Candy,I'm sorry to hear you're not feeling well and I'd give you some tip.tipsFirst,you shouldn't stay up later to study every night,since it is A great importance to get enoughlateofsleep.Indeed you are busy learningthatteachers have taught you,so you still need to keep awhat/whateverbutbalance between leisure and studies.If you had to stay up,I would suggest you ate more vegetables andeatfruits.Have a talk with your family or friends might be useful when we really have difficulty solvingHavingyouproblems.I'm sure they will provide you with necessarily and timely help.necessaryI hope you'll take a good care of yourself and be in a good mood.Yours,Li Hua

10.【解析】(1)小球从A点射入时恰好对轨道无压力，vi有mg=m(2分)从A点到M点机械能守恒，有mg·2R=m话-m(2分)在M点，有F一mg=m是(2分)由牛顿第三定律可得小球对轨道的压力F=F(2分)解得F=6mg(2分)(2)设小球到达N点时的速度为3，根据机械能守恒定律得合话=7m话-mgR1-cose）(2分)解得=2√gR(2分)小球从N点做斜抛运动，上升的竖直高度为h=(vgsin a)=3R2g2(2分)