The calculation of power

1.

1. Gravity g = mg

(vertically downward, g = 9.8m/s2 ≈ 10m / S2, the action point is at the center of gravity, applicable to the earth surface)

2. Hooke's law f = KX

{along the recovery deformation direction, K: stiffness coefficient (n / M), X: deformation variable (m)}

3. Sliding friction force F = μ FN

{opposite to the relative motion direction of the object, μ： Friction coefficient, FN: positive pressure (n)}

{rrrrrrr}

extended data:

different classification of force

1. According to the nature of force, it can be divided into gravity, universal gravitation, elastic force, friction force, molecular force, electromagnetic force, nuclear force, etc Note that gravity is not equal to gravity under all conditions Gravity does not point to the center of the earth under all conditions. Gravity is a component of the earth's gravitational force on an object, and the other component is a centripetal force. Only on the equator does gravity point to the center of the earth.)

According to the effect of force, it can be divided into tension, tension, pressure, supporting force, power, resistance, centripetal force, restoring force, etc

According to the research object, it can be divided into external force and internal force

According to the action mode of force, it can be divided into non-contact force (such as gravitation, electromagnetic force, etc.) and contact force (such as elastic force, friction force, etc.)

There are four basic interactions (forces): gravitational interaction, electromagnetic interaction, strong interaction and weak interaction

nature of force:

materiality: force is the effect of an object (matter, mass) on an object (matter, mass). When an object is subjected to a force, another object must exert this effect on it. Force cannot exist independently without an object

interactivity (interaction): the interaction between any two objects is always mutual, and the object exerting the force must also be the object under the force. As long as one body exerts a force on another, the stressed body in turn will surely add a force to the exerted body Generating conditions: the force is equal in size (the resultant force is zero, in a state of non directional static motion) or not equal, in the opposite direction, acting on two different objects, and acting on the same straight line. It can be summarized as: foreign body, equivalent, reverse, collinear. A pair of interaction forces must proce and disappear at the same time.)

Vectoriality: force is a vector, which has both magnitude and direction

simultaneity: the force proced and disappeared at the same time

independence: the effect of one force does not affect the effect of another

includes three elements: the size, direction and action point of the force. The accurate expression of the three elements of force by a directed line segment is called the diagram of force. The size is represented by the length of a scaled line segment, the direction is represented by an arrow, the point of action is represented by an arrow or the tail of an arrow, and the straight line along which the direction of a force follows is called the line of action of a force. The diagram of the force is used for the calculation of the force. When the judgment power is large, we must pay attention to the scale of the line segment, because even if one line segment is longer than another line segment, but the scale of the long line segment is also longer, the force represented by the short line segment is not necessarily smaller than that represented by the long line segment

2.

There is no specific formula for supporting force. Sometimes supporting force = gravity or = friction

when expounding the concept of supporting force, it is always said that one object has supporting force for another, then the latter is the stressed object, and the point of action should be marked on the stressed surface. For example, if a wooden block is placed on the horizontal desktop and is supported by the desktop, the point of action of the supporting force is marked on the center of gravity of the wooden block

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extended data:

I. nature of force:

1. Materiality: force is the effect of object (matter, mass) on object (matter, mass). When an object is under the action of force, another object must exert this effect on it. Force cannot exist independently without object

3. Vectoriality: force is a vector, which has both magnitude and direction

4. Simultaneity: the force proced and disappeared at the same time

Independence: the effect of one force does not affect the effect of another

According to the nature of force, it can be divided into gravity, universal gravitation, elastic force, friction force, molecular force, electromagnetic force, nuclear force, etc. Gravity does not point to the center of the earth

2. According to the effect of force, it can be divided into tension, tension, pressure, supporting force, power, resistance, centripetal force, restoring force, etc< According to the research object, it can be divided into external force and internal force

4. According to the action mode of force, it can be divided into non-contact force (such as gravitational force, electromagnetic force, etc.) and contact force

5. Four basic interactions (forces): gravitational interaction, electromagnetic interaction, strong interaction and weak interaction

3. It's not an ordinary fake. Police intervention is the best explanation. The YTC currency combines the advantages of SMI and the advantages of bitcoin, and avoids the shortcomings of each other. It improves the electronic stock mode. The mode adopts the out cycle system, which can effectively control the worry of bubble and bring everfount earnings to investors.

4. The concept of the Internet of things has been put forward for many years. In recent years, with the popularity of big data and artificial intelligence, the Internet of things seems to fade out of people's vision. However, as a relatively mature technology, the Internet of things has been deeply implemented in instry. Many domestic instrial companies have launched IOT concept network in a shares and US shares. What are the instrial IOT concept stocks in 2018? Let's take a look at it today
PTC (NASDAQ: PTC) recently announced the publication of a series of research reports on the status of instrial innovation, which are published twice a year. Based on the data of PTC customer base, this series of reports provides objective analysis of the current development status and future promotion plans of instrial Internet of things (IOT) and augmented reality (AR) technology. Each report examines the instries that drive the popularity of these two technologies, the functions and use cases deployed across the blockchain, and the types of business value they bring
Mike Campbell, executive vice president of thingworx platform of PTC, said: "with the continuous maturity of the technology and business model of instrial Internet of things and AR, its popularity will show a rising trend. PTC combines market experience and massive penetration data to truly examine these rapidly evolving markets from a comprehensive perspective. "
as described in the "status quo of instrial Internet of things" and "status quo of instrial augmented reality", instrial Internet of things and Ar are no longer just promising emerging technologies. In 2018, investing in such technologies has become a key strategy for many organizations, especially for technology stocks that involve complex manufacturing and operational processes. Among the PTC customers who have adopted the instrial Internet of things or AR technology, 83% and 85% of the instrial Internet of things users and AR users have migrated to the full-scale proction environment or plan to complete the migration in the next 12 months, respectively< The main points of the report are as follows:
current situation of instrial Internet of things
1. At present, the instrial Internet of things is mainly used by large proct manufacturers in instrial procts (25%), electronics and high technology (22%), automobile (13%) and aerospace and national defense (11%)
2. The economic potential of instrial Internet of things has attracted the attention of the international community, and has spawned some global initiatives aimed at promoting the development of global instrial Internet of things< At present, most of the solutions are used in manufacturing and operation (48%), and the collected data can be used to improve the process, forecast the maintenance demand and improve the overall operation efficiency
Instrial Internet of things is no longer an emerging technology - it has developed into a mature and widely recognized stage. The instrial Internet of things is now being deployed in large quantities, involving a wide range of functions from proct development to manufacturing and services
current situation of instrial augmented reality
instries such as instrial procts (21%), automobile (11%), aerospace and national defense (8%) are leading the initial popularization of AR
AR is widely used in all aspects of the value chain, especially in service (19%) and manufacturing (18%)
AR can become a powerful tool for operation tips and guidance, thus providing an entry point for many organizations, especially those instries involving hundreds of key processes, such as real-time monitoring and improving equipment overall efficiency (OEE)
large scale investment in underlying hardware and software technology will promote ar penetration to a critical point, so that pilot projects can quickly migrate to the full proction environment< Relevant concept stocks:
000701 Xiamen Xinda: the first batch of partners of Alibaba IOT platform
300203 focus technology: the company signed a strategic cooperation framework agreement with the people's Government of Zhangqiu City, Shandong Province, to build "smart environment cloud data center", "smart environment decision-making and public service platform", "smart environment emergency command and scheling platform" and "atmospheric haze pollution monitoring and warning platform"
300007 Hanwei Technology: the leader of domestic gas sensors, mass proction of flow and pressure sensors, establishment of municipal gas IOT network subsidiary; 51% equity of Shenzhen Mingzi IOT Technology Co., Ltd
000851 Gaohong: at present, Datang Gaohong has clearly focused on the development of RFID Business in logistics application and value-added application of the combination of RFID and TD
002881 megger Intelligence: main business: wireless sensor network system solutions, MEMS sensor chips< Haitong news: the company is the largest supplier of communication network physical connection equipment in China
300590 move to communication: the company brings together technical experts and business elites in the field of wireless communication technology, and is a leading provider of wireless Internet of things devices and solutions in the instry
300259 Xintian Technology: xiongan + Alibaba Internet of things, al concept
300205 Tianyu Information: a leading provider of procts and solutions in the field of data security in China
300286 ankerui: the main manufacturer of intelligent power monitoring system and instrument for domestic instrial and mining enterprises
600271 Aerospace Information: committed to the research and development of IOT chip
002474 Rongji software: signed a memoranm of cooperation with Huawei and Fuzhou municipal government to jointly promote the construction of the first NB IOT Experimental Bureau in China
300131 Yingtang Zhikong: Fengtang IOT, the holding subsidiary of the company, and Tencent technology signed a cooperation framework agreement on procts and services of Internet of things
000997 New World: Taking the Internet of things as the main line, the company realizes "one main" (core technology of Internet of things perception and identification, key procts of Internet of things) "two wings" (Internet of things application and Internet of things business model innovation)
000682 Dongfang Electronics: Dongfang Electronics Group has a strong RFID instry in the core area of the Internet of things, with an authentic "Internet of things" concept
002047 BAOYING shares: it plans to increase the capital of Shenzhen guochuang Zhilian Network System Co., Ltd. with 100 million yuan in cash to obtain 20% equity. Guochuang Zhilian has LTE wireless smart city solution, wireless broadband private network system and terminal equipment, and provides solutions for government affairs and police private network, instrial Internet of things and smart city construction
002161 yuanwanggu: the company has invested in five Internet of things projects such as intelligent tracking device of railway train number
002093 Guomai Technology: the company has its own cloud platform, mass storage and big data solutions with independent intellectual property rights, and is deeply involved in the big data cloud computing of the Internet of things
300638 guanghetong: focus on the wireless communication field of Internet of things and mobile Internet, independently design and develop fibocom brand procts
300183 Neusoft carrier: chip level equipment manufacturing, benefiting from the chip demand brought by the development of Internet of things
300310 Yitong century: cooperate with Jasper, the world's best Internet of things platform, to provide Telecom grade Internet of things connection
000063 ZTE: NB IOT chip design leader 4G, 5g<
300066 Sanchuan wisdom: a leading enterprise in smart water instry in China, and at the same time marching into the big data field of Internet of things
002017 Dongxin Heping: its business scope is involved in many smart card application fields such as identity recognition and RFID (electronic tag)
300259 Xintian Technology: the company has researched and reserved nb-iot technology in the early stage, and its procts use narrowband Internet of things technology<
600100 Tongfang Co., Ltd.: the company is a supplier and system integrator of smart card and RF technology procts. Its procts involve the design and supply of IC chips such as ID, telecom, financial payment, information security, etc
002711 oupu: the company's "ground network", "Sky Network" and "Golden Network" three networks in one strategic layout
300275 mayanson: the security monitoring technology of Internet of things is leading in the instry. With the "security application of Internet of things instry", it actively arranges many emerging businesses with huge development space, such as urban pipe network and gas safety, environmental protection emergency, public security fire protection, structural safety, safety cloud service, etc
300456 Neville Technology: acquired celex MEMS foundry (the world's largest), raised 750 million yuan to build an 8-inch MEMS proction line in Beijing<
300458 Quan Technology: the design manufacturer of intelligent application processor SOC and intelligent analog chip
300098 Gao Xinxing: Guangzhou Zhixing IOT, the holding subsidiary, mainly provides IOT solutions for operators from the development of IOT related business platforms and procts, and participates in the operation and security of operators' IOT business cooperation
300101 core technology: MEMS Integrated Navigation: MEMS gyroscope and accelerometer
000727 East China Technology: East China technology is one of the core sensor manufacturers in the Internet of things instry
the above is the details of instrial IOT concept stocks in 2018. It can be seen that there are still many companies involved in IOT, and IOT will become a common technology in proction. If you still have more to say, you might as well take a look at the stock market knowledge with Xiaobian. More information is available on weishang times
the above is reprinted by Internet of things media. If there is any infringement, please delete it

5. Damage calculation formula: the lower the target's damage, the greater the damage caused by power split when using power split Huashan attack
through experiments, the damage formula of force splitting Huashan is roughly:
[baby damage target defense
+
BB damage target damage] * coefficient
Danggang damage & gt; When target damage, coefficient = 1.5
when target damage & lt; For target damage, the coefficient is 0.5

6. A is the acceleration
that is, the speed change of the object under the action of the external force
at this time, the external force on the object is f
the formula of the external force is f = ma
, and M is the mass of the object
when the object is only affected by the earth's gravity g, then the acceleration a is the acceleration of gravity g
that is to say, a in the above formula is replaced by G
and the external force is equal to gravity, that is, f = g = Ma = mg. Therefore, f = mg
and g = mg
F = ma
can be used for any problem
G = mg
it is the same as F = ma in essence when an object is subjected to gravity
when an object is subjected to other forces besides gravity, a is not equal to g

7. 1. Force (f): force is the action of an object on an object
the forces between objects are always mutual
unit of force: Newton (n)
force measuring instrument: dynamometer; The laboratory uses a spring dynamometer
the effect of force: make the object deform or change the motion state of the object
the change of object motion state refers to the change of object velocity or motion direction
2. The three elements of force: the size, direction and action point of force are called the three elements of force
the diagram of force should be scaled; A schematic diagram of the force without scale< Gravity g: the force exerted on an object e to the attraction of the earth. Direction: vertical down
relationship between gravity and mass: g = mg, M = g / g
G = 9.8 N / kg. Pronunciation: 9.8n/kg, which means that the gravity of an object with a mass of 1kg on earth is 9.8N< Center of gravity: the point where gravity acts is called the center of gravity of an object. The center of gravity of regular object is on the geometric center of the object, and the center of irregular object may or may not be on the object< (4) two force equilibrium conditions: acting on the same object; The two forces are equal in magnitude and opposite in direction; Acting on a straight line
under the balance of two forces, an object can be stationary or move in a straight line at a constant speed
the equilibrium state of an object means that the object is in a state of static or uniform linear motion. The resultant force of the external force on an object in equilibrium is zero
5. Combination of two forces on the same line: same direction: resultant force F = F1 + F2; The direction of resultant force is the same as that of F1 and F2
the direction is opposite: the resultant force F = F1-F2, and the resultant force direction is the same as that of the large force
⒍ under the same conditions, rolling friction is much smaller than sliding friction
the sliding friction is related to the normal pressure, material properties and roughness of the contact surface Newton's first law is also known as the law of inertia. Its content is that all objects always keep static or uniform linear motion when they are not affected by external forces
inertia: an object has the property of keeping the original static or uniform linear motion state, which is called inertia

buoyancy
1. Buoyancy and its causes: an object immersed in liquid (or gas) is supported vertically by liquid (or gas), which is called buoyancy. Direction: vertical upward; Cause: the pressure difference between the liquid and the object
2. Archimedes principle: an object immersed in liquid is subject to upward buoyancy, and the buoyancy is equal to the gravity of the object expelling the liquid
that is, f floatation = g liquid discharge = ρ Liquid GV discharge The formula for calculating buoyancy: F floating = G-T = ρ When the object floats: F floats = g object and ρ Things & lt; ρ Liquid when the object is suspended: F floating = g object and ρ Things= ρ Liquid
when the object floats up: F floats & gt; G and ρ Things & lt; ρ Liquid when an object sinks: F floats & lt; G and ρ Things & gt; ρ liquid

8. Solution: Let G = 10m / S & # 178;, 1/2mv²= 2.4 v = √ 48 / m ℅ MV = √ 48m ∵ MV = ft ∵ f = MV / T
F = √ 48m / T = 2.4 / T
here t is the impact time, which needs scientific estimation, the time may be a few seconds, in short, so the force is very large
it should be noted that energy conservation and momentum conservation are used

9. No matter what power, whether n.m/s or v.a/s, its basic unit is w and no conversion is needed

10. By strengthening equipment, inlaying gems, engraving stars and characters, improving equipment level, increasing points and so on, the comprehensive strength will be improved. It is particularly important to strengthen equipment. It is recommended that 90 enhancement gems of level 75 should not be used before level 90.. I cried