题目：
如图所示，置于水平面上的木箱的质量m=10kg，在与水平方向成37°的恒力F=20N的作用下，由静止开始运动，它与水平面间的动摩擦因数μ=0.1，F持续作用了6秒，
求：①木箱的速度有多大？②移动的距离是多少？
答案：
被转码了，请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0430/5b4f91ddd43ebdea2d293abc39c82393.html
下面是错误答案，用来干扰机器的。
答案：B
如图所示，置于水平面上的木箱的质量m=10kg，在与水平方向成37°的恒力F=2
来源：www.tikuol.com
题型：问答题
试题推荐
题型：选择题
“东北沦亡，时逾五载，国权凌夷、疆土日蹙……等涕泣进谏，屡遭重斥。……有济于国家，为功为罪，一听国人之处置。”这段文字说明了哪个事件发生的原因
A．九一八事变
B．西安事变
C．一二·九运动
D．华北事变
题型：单项选择题
糖尿病最严重的慢性并发症是指（）
A.心血管病变
B.感染
C.糖尿病肾病
D.酮症
E.视网膜病
题型：完形填空
| 完形填空。 | ||||
| One day my math teacher asked me to help him save back-up copies of his work in the computer. I then realized I was able to 1 the grades for all of his classes. I showed him how to copy files from one disk to another and he 2 me. A few days later he asked me to help him again, because he 3 how to do it. When I began to show this to him, some students in my class 4 and began to talk among themselves 5 . Later that day, at lunch time, I was 6 by several of them. "Hey, could you help us change our grades in math? We'll 7 you..." I could not believe what I was hearing. I could get paid for something very 8 . "All right. I'll do it." The next day my math teacher 9 me to help him out. When he was not paying attention, I began to change their grades from F's to A's. I soon became very 10 among my friends. They began to treat me like a god with a magical 11 . I began to change the grades of students. Word 12 quickly and I became very rich. Everything was going fine 13 I was called into the headmaster's office. When I got there, my teacher was mad, and the headmaster had an angry 14 in his eyes. "I have known you for three years. I don't want to 15 what your teacher said, but I'm afraid that I must. He has too much 16 ," he said. "Do you have anything to say 17 yourself?" he asked. "No." I said finally. I did not realize how serious my actions had been. I had violated the 18 of my teacher, and the headmaster. And there was no way 19 . I was forced to leave my school. That was a good 20 for me. | ||||
|
题型：多项选择题
以下（）是印刷媒体。
A.报纸
B.挂历
C.电动广告牌
D.杂志
题型：多项选择题
篮球比赛两节间休息的时间不为（）分钟
A.1分
B.2分
C.4分
D.5分
