问题
问答题
如图，质量为M、长为L、高为h的矩形滑块置于水平地面上，滑块与地面间动摩擦因数为μ；滑块上表面光滑，其右端放置一个质量为m的小球．用水平外力击打滑块左端，使其在极短时间内获得向右的速度v0，经过一段时间后小球落地．求小球落地时距滑块左端的水平距离．
答案
略
搜题请搜索小程序“爱下问搜题”
如图，质量为M、长为L、高为h的矩形滑块置于水平地面上，滑块与地面间动摩擦因数为μ；滑块上表面光滑，其右端放置一个质量为m的小球．用水平外力击打滑块左端，使其在极短时间内获得向右的速度v0，经过一段时间后小球落地．求小球落地时距滑块左端的水平距离．
Sometimes people may feel lonely. Many people don’t like loneliness, so loneliness is a big problem in our life. 小题1: Here are some tips. 1. Keep yourself busy. One of the best ways not to be lonely is to do something all the time, 小题2: . You can give yourself some housework, such as cleaning, cooking and washing. 2. Make a plan for your work. In this way, you’ll have more time and energy to do many other things you like to do. Also, you can use your time well and enjoy your life. 3. Do sports. If you feel lonely, you can go out to play sports. Playing sports is a good way to help you not to be lonely. 小题3: . 4. Watch some comedies. 小题4: During the time, your feeling will be better. 5. Go to sleep.If you go to sleep, you can dream of something nice. 小题5: . If you follow the advice, you can get over（克服） loneliness well. Come on!
|