The friction of a circle is the speed

1. It seems that there is no such ATM in Shanghai. Machines with this logo need to support foreign bank cards and overseas withdrawals.

2. Let the mass of the disk be m
friction torque: l = ∫ RDF = ∫ R* μ( mg/ π R^2)*2 π rdr=2 μ Mgr / 3
moment of inertia: J = Mr ^ 2 / 2
angular acceleration: β= L/J=4 μ G / 3R
uniform angular acceleration formula: ω&# 39;^ 2- ω^ 2=2 βΔθ, among ω&# 39;= 0
so the angular displacement of the disk Δθ= 3R ω^ 2/(8 μ g)

3. Some shopping malls ATM money place can be exchanged, you can go to Ctrip online exchange, the day can take money, and then go to the nearest outlets to get money, just as convenient

4. A week ago, according to the online route, one number a day can dig 30 yuan of mine, but it's not sold right away. It's the most valuable three weeks after the development zone. I can hang five numbers on one machine, and I won't be able to dig a lot after a week, because the world is full of mine diggers. After three weeks, you can go to 5173 and hang up WMB, and then wait for others to buy it. There are many people who buy game currency in the new area. Don't be afraid that they can't sell it. How many machines do you want to buy? See if it's worth it

5. Independent
friction f= μ N
μ Is the friction coefficient
n is the positive pressure
so the friction is related to the friction coefficient and the mutual pressure of the two friction plates

6. You can go to the following website: http://map.cmbchina.com/ Then select "city" and click "ATM / self service equipment" to query or search for the distribution of CMB ATM.

7.

In China's sports circle, capital intervention cases are not uncommon in recent years. Wang Jianlin of Wanda and Zhang Kangyang of Suning are typical examples. As China's richest man, Ma Yun also joined the football game, which is expected to be boosted by capital. In 2014, he spent 1.2 billion yuan to buy 50% shares of Evergrande from Xu Jiayin, officially opening the game. So the question is, after more than six years, is Ma Yun's investment a profit or a loss? Well, listen to me

Third, the money Ma Yun made by investing in Evergrande is brilliant, but in China, few people are willing to go to the football match and the ticket income is very low. If you want to maintain the operation of the team, you have to rely on the continuous investment of investors. Evergrande can always be in the top position now, which has a lot to do with Xu Jiayin and Ma Yun

the current club has received high attention, and now Evergrande is the first football stock in Asia. Now, excluding some expenses, Ma Yun can earn about 6 billion yuan, which is more than 4 billion yuan compared with six years ago

both Xu Jiayin and Ma Yun are successful entrepreneurs who have made great contributions to Chinese football. They have a very noble management style and are happy for people in the football circle. If Chinese football can have more entrepreneurs like them, it would be a good thing

8. Although a successful entrepreneur has failed once now, he will get up right away with his experience

9. Let "the spring force to the object" be F1, and "the friction force from the turntable to the object" be F2
(1) when the spring has extended, there are more cases< br />F1=m* ω^ 2*r(F2=0)
F1+F2=m* ω^ 2 * r (when F2 points to the center of the circle, the rotating speed of the turntable is larger)
F1-F2 = m* ω^ (2) when the spring is compressed, the direction of F2 always points to the center of the circle. At this time, when the rotation speed of the object is large and the object is about to slide, F2 is the maximum static friction

in addition, when the spring is extended and the rotation speed of the object is large, the direction of F2 is also "pointing to the center of the circle". When the object is about to slide, F2 is also the maximum static friction

(3) for example, when the spring is originally extended, the turntable is stationary. The direction of static friction is first "inward" and then "outward"

before the object slides, the inward static friction decreases with the increase of rotation speed, and the outward static friction increases with the increase of rotation speed

(4) "replace spring with rope", rope will not give "repulsive force"
objects are not subject to "static friction" because they have no tendency to move

in fact, the force given by the spring is determined by the "shape variable" (elongation or compression), and the force on the rope can be changed Change with speed)

10.

Sichuan chuangrong blockchain Technology Co., Ltd. is another limited liability company incorporated in Jinjiang District, Cheng City, Sichuan Province on September 29, 2018, with its registered address at No. 9-1, Lihua street, Jinjiang District, Cheng City

the unified social credit code / registration number of Sichuan chuangrong blockchain Technology Co., Ltd. is 91510104ma6b6l3g86, and the enterprise legal person is Wang Jianan. At present, the enterprise is in the status of cancellation

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