Mining machinery in Africa

1. Before calculating the friction force, we must first analyze the motion of the object to determine whether it is static friction or sliding friction. If it is sliding friction, we can use the formula F= μ N calculation, where μ Is the coefficient of friction; If it is static friction, it is generally based on the motion of the object (static, uniform motion, or variable speed motion), In order to determine the direction of sliding friction, it is necessary to grasp the judgment basis of "the direction of sliding friction is opposite to the relative movement direction of the object". The specific method is: first select the object subject to friction as the research object, and then take the object directly in contact with the research object as the reference object, Find out the velocity direction of the research object relative to the reference object, then the direction of the sliding friction is opposite to the direction of the relative velocity.
the basis for judging the direction of the static friction is: "the direction of the static friction is always tangent to the contact surface, and is opposite to the direction of the relative motion trend of the object". The specific method is: firstly, select the object subject to static friction as the research object, Then, the object in contact with the research object is selected as the reference object, and the velocity direction of the research object relative to the reference object, that is, the direction of relative motion trend, is judged by assuming that the contact surface is smooth. Then, the direction of static friction is opposite to the direction of relative motion trend

2. Is it sword hero 2? There is no solution to this problem. In a sense, players only have the right to use virtual goods, but they don't have the right to own them, especially the kind of free games that are free forever

3. Fake. It's not safe to invest in AMBC. Social finance through the inquiry, African AMBC international instrial group, in the domestic display can not return to the inquiry
it is reported that with the upsurge of blockchain, the most serious chaos appears in digital currency, and these projects integrate the concept of blockchain and financial knowledge
first of all, PS technology is used to package the MLM leaders into the cover characters of various magazines. (if you look at the connection of the pictures carefully, there is no depression on the sofa). With this virtual gimmick, the blockchain digital currency came back
extended information:
AMBC is the "non China mining investment fund"
the actual controller of the "non China mining investment fund" is Sun Peng, who was born in Tai'an City, Shandong Province. Sun PENGYUAN was the principal of Taian Jincheng Taishan Jasper Instry Co., Ltd. and a member of the second Taian CPPCC Committee. However, Sun Peng started to organize and plan MLM activities as early as ten years ago
according to the open judgment of Jinan Intermediate People's court in Shandong Province, Sun Peng established Taishan jade company on May 26, 2011 to engage in the research, development, design and sales of Taishan jade
source of reference: harmonious Shaanxi Network - African AMBC international instrial group company's countdown to listing

4. Don't participate in the investment you don't know. You may encounter equity fraud. As for the meeting, it doesn't matter at all.

5. In fact, Africa is rich in resources. It's just that the local people are lazy, which leads to poverty and backwardness. If Chinese people do these things, they will certainly contribute to future development and increase wealth.

6. There are very few miners in Africa! Unless there is something abnormal
What did your friend ask you to buy for $100? How much do you want to earn if you lose 100 dollars at most?

7. Of course, it is a leading enterprise,
because this mine is the largest mining instry in Africa,
it has the best benefit.

8. Investment is risky. That's all I can tell you. It's also Africa's mining instry. Don't fall into other people's fund-raising trap.