How to calculate the linear distribution force

1. Do you understand free vectors (vectors, I'm trying to distinguish tensors) and non free vectors? The force is different from the vector in mathematics, so it can't move the initial position arbitrarily. The principle of force balance is one of the five axioms of mechanics, which you should understand. After the distributed forces (linear with elementary mathematics, nonlinear with integral) are combined into resultant forces, the point of action should be considered. The size is Q, which is the resultant force. The point of action should ensure that the concentrated force q is equivalent to the original distributed force. You can determine the position by having the same moment for a point. For example, if a simply supported beam is subjected to a uniformly distributed load Q, then the resultant force is q = QL. If the point of action is at L / 2, then the resultant force is equivalent to the distributed force (the moment for the end point is 0).

2. (Q1 + Q2) * L / 2 q1.q2 are the maximum and minimum values of linear load respectively

4. Beijing Shanghai high speed railway Suzhou north station
10 meters
walk to Beijing Shanghai high speed railway Suzhou north station
27 stops
take bus no.811, get off at Shuangta station
80m
walk to Linton Road Station
3 stops
take Metro Line 1 (towards Zhongnan Street), get off at Central Park Station (exit 1b)
1.0KM
walk to Suzhou Instrial Park physical examination center

5. 1. Act currently only allows GAC international university preparatory students to take the exam. Therefore, students who want to apply for act in China need to take GAC preparatory courses. Details can be found on Act's official website
2. Introction to GAC International College Preparatory Course: GAC (Global Assessment Certificate), an international English preparatory course, is a sub course of Act (American College Test). It is the most widely recognized international matriculation course in the world
GAC global assessment certificate teaching centers are all over the world, such as Australia, the United Kingdom, the United States, Japan, South Korea and so on. There are more than 30 teaching centers in Beijing, Shanghai, Hong Kong, Taiwan, Chongqing, Xi'an, Cheng, Shenzhen, Guangzhou, Guiyang, Hangzhou and Suzhou
act not only tests students' mastery of English, but also their mathematical ability and scientific quality. It is an examination focusing on testing students' comprehensive ability. The total score of act is 36, which consists of four tests:
1. English test aims to measure the examinee's ability of understanding and analyzing written English< (2) mathematics test aims to measure the quantitative reasoning ability of examinees< (3) the reading test is designed to measure the examinee's ability of understanding, analyzing, evaluative reasoning and problem-solving. The reading test covers natural science, social science, humanities and even literature and art< (4) the scientific reasoning test is designed to measure candidates' ability to use charts, tables and research summaries to deal with scientific concepts. In addition, there are optional 30 minutes of English writing to test students' English writing ability.

6. Action games
I haven't seen the software
act belongs to the game type of holding a knife and chasing people
not RPG

7. The first part of the test is English test, which takes 45 minutes to complete 75 questions. The difficulty of the questions is different. Pay attention to skip the difficult questions in the exam and do the simple questions well first. Don't waste too much time in the difficult part and miss the chance to get points in the simple part. In the error correction part of the article, make sure to get the simple questions. The invigilator will remind the examinee when there are 5 minutes left. When the invigilator says it's time to stop writing, he must stop writing
2. Mathematics test
the second part is mathematics test, which lasts for 60 minutes and has 60 questions. This topic is very simple, and you can use a calculator, but because the exam time is limited, most people are a little nervous. It is usually difficult for some people to read and understand long questions, so it is suggested that students practice more such questions. After the end of the second part, candidates can rest for 15 minutes, go out of the examination room, or stay in the classroom to eat their own food

3. Reading test
the third part is reading test, which is the most difficult and time-consuming. In 35 minutes, read 4 articles and do 40 questions, each article has more than 700 words. The four articles in the test paper generally appear in the following order: novel, social science, humanities and natural science
among them, the novels are excerpts from the works of British and American writers. Social sciences are based on anthropology, archaeology, biography, economics, ecation, geography, history, politics, psychology, etc. Humanities articles mostly involve architecture, art, dance, film, literature review, biography, music, essays, philosophy, television and so on. Natural sciences generally include astronomy, biology, chemistry, geology, medicine, physics and so on
most mainland children are easy to start with science, especially natural science, with typical structure and standard topic setting. Therefore, it is recommended to do natural science first, then social science, and finally fiction and humanities. Note that this behavior does not belong to the cross district, as long as the candidates do not do other parts in the 35 minutes (article error correction, mathematics, scientific reasoning), they can choose the order of reading the article. Of course, which one to do first depends on the indivial situation
the first kind of questions are generally direct questions about the information provided in the text, which require candidates to find the correct correspondence and make synonymous conversion; The second kind of questions is to ask questions about the examples in the text, which need candidates to answer the role of the examples in the text; The three types of questions are different from the direct fact questions. They are not direct questions about the information in the text, but to examine what is actually implied in a certain content written by the author
however, all the questions are more inflexible than sat reading, that is to say, as long as you can grasp the main idea of the article, you don't need any brain to "think" about implication when doing the questions. The above are three common act reading questions. There are similarities in the three solutions. They all conform to one principle, that is, all the answers must be found in the original text, and no association should be made
4. Science reasoning test
the fourth part is science reasoning test, which integrates high school physics, chemistry, biology and other disciplines into a single paper and appears in the form of reasoning questions. The way of writing questions is flexible, which tests the mastery of high school knowledge and logical ability. This part is not difficult, but the method is important. For most of the problems, you don't need to read the introction of the experiment carefully, just look at the problems directly, and the key to solve the problems is in the clear tables and images. Note that if this part of the method is not appropriate, the same will not finish all the questions in the specified time, so before the test must practice how to use the method to quickly solve the problem
5. The composition part
is the composition part. The full score of the composition is 36, which is not included in the total score, but given separately. At this time, the invigilator will take away the previous paper, so the unfinished answer sheet must be finished in the scientific reasoning part. It's impossible for some children's shoes to finish their composition and then repaint together. In the composition section, a new test paper will be issued, with the title printed inside. The time is 40 minutes, and the title is not difficult. Since September of this year, act writing has been reformed, and the topic is not as easy to understand as before, so it needs more pondering
hope to adopt

8. First of all, let's take a look at the difficulties of act reading
First: the time is short
the candidates need to read four articles with 700 words in 35 minutes, and complete 40 corresponding topics. For many students, they can't finish four articles
Second: the word is difficult
act reading the corresponding four types of articles, all have frequent high-frequency words, in the preparation process of the exam, it needs to spend a lot of time on the accumulation of words
Third: sentence pattern is difficult
in reading articles, there are often three or five lines of "big long sentences", which requires candidates to have a solid foundation in grammar, can quickly grasp the subject, predicate and object of the sentence in the shortest time, so as to accurately grasp the main idea of the sentence
in order to get high scores in act reading, we can start from the following aspects
(1) the mastery of vocabulary
the mastery of vocabulary is certain. Although the mastery of words in act is not particularly difficult compared with SAT, it is also necessary to understand words in act reading
when you see a word, even if you can't spell it, at least you need to understand the meaning of the word
it is suggested that we should start from the following directions to recite words:
(1) recite the word book
(2) focus on the words in the real questions. Because the content of act reading articles is relatively fixed, it is suggested that you can find out all the new words and common words in the real topic, and make a word list to facilitate classification and memory< (2) cultivate the ability to analyze long and difficult sentences
understand long and difficult sentences
when encountering long and difficult sentences, the most important thing is to clarify the sentence structure, where is the main sentence? Where is a clause? What are the subject, predicate and object? After sorting out these problems, the meaning of the sentence will naturally emerge
you can understand new words, phrases, sentence patterns and sentence patterns first, and then translate them together
for long and difficult sentences, we need to train every day, and try to find more long and difficult sentences to analyze and understand every day. In addition, you can also improve your understanding of long and difficult sentences through extensive reading. You can read the article on time and finish it in about five minutes. Then, you can try to summarize the main idea of each paragraph by yourself. Finally, you can divide the article into "part" exercises. If you can accurately divide the article into several large parts, That means you really understand
(3) keep doing and brushing questions
keep brushing questions, because doing too many questions naturally means "practice makes perfect". However, when making questions, we should pay attention to
making questions is not blind brush, do not do the right questions to improve our act reading level is not helpful. We can brush the questions from the following aspects:
(1) we mainly focus on og and past examination questions (note that the old questions before the reform in 2004 and before can be found on the Internet. Although the types of questions are slightly different, they are more difficult than those after 2005 and can improve the reading level)
(2) model test questions. Model test questions must choose high-quality materials, do not blindly choose
of course, when we do the exercises, we should also grasp the time. Every set of act reading questions we find for ourselves will be completed in 35 minutes, and every exercise will be treated as an exam. In this way, we can enter the real exam naturally. At the same time, the most important task for us to do is to analyze our mistakes. We must find out why we are wrong, whether it is because of the word problem, or because we are careless, or because we have a wrong understanding of a grammatical phenomenon, or because we don't know how to solve the problem. Only in this way can you improve your reading ability, instead of simply doing the questions quickly or slowly
(3) accumulate extra-curricular knowledge. Act requires a high speed of writing questions, especially for the scientific part, which requires faster processing of new information. In the reading part, rich extra-curricular knowledge is very important. More contact with literary works and novels after class will also help reading
in addition to these basic test preparation requirements, it is also helpful for us to know some test writing skills to improve our act reading performance
(1) marking
when reading, you can mark the people, things and key sentences related to the questions, or mark the unfamiliar words and places you don't understand, which is more concive to our summary of knowledge points, understanding the expression of the article, and getting the answers accurately
(2) pay more attention to the causal words in the article
in this passage, in order to. In general, when doing this kind of question, we should first locate the stem, find out the Related words in the text, and then understand the sentence paragraph to find out the answer.