Mechanical Advantage, Velocity Ratio and Efficiency
Mechanical advantage is defined as the ratio of resistance overcomes to the effort applied. Velocity ratio of simple machine is the ratio of distance travelled by the effort to the distance travelled by load in a machine. The efficiency of a simple machine is defined as the ratio of useful work done by machine (output work) to the total work put into the machine (input work). This note provides us with an information about mechanical advantage, velocity ratio and efficiency.
Summary
Mechanical advantage is defined as the ratio of resistance overcomes to the effort applied. Velocity ratio of simple machine is the ratio of distance travelled by the effort to the distance travelled by load in a machine. The efficiency of a simple machine is defined as the ratio of useful work done by machine (output work) to the total work put into the machine (input work). This note provides us with an information about mechanical advantage, velocity ratio and efficiency.
Things to Remember
- Mechanical advantage is defined as the ratio of resistance overcomes to the effort applied.
- Velocity ratio of simple machine is the ratio of distance travelled by effort to the distance travelled by load in the machine.
- The efficiency of a simple machine is defined as the ratio of useful work done by machine (output work) to the total work put into the machine (input work).
- For ideal or perfect machine, work output is equal to the work input but in practice, the work output of a machine is always less than work input due to the effect of friction.
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Subjective Questions
Q1:
Write the objectives of business.
Type: Short Difficulty: Easy
<li>Organic Objectives</li>
<li>Economic Objectives</li>
<li>Social Objectives</li>
<li>Human Objectives</li>
<li>National Objectives</li>
</ol>
Q2:
Describe the objectives of business(at least two)
Type: Short Difficulty: Easy
<p>A business is not only an economic unit, it is also a social institution. so, a business must set its social objectives. They are the social obligation that a business must try to fulfill.</p>
<ul>
<li><strong>Supply of quality products at fair price</strong>: <br />It is the primary objective of business. A business must be aware of tastes, preference, and needs of its customers to maintain a continuous and adequate supply of quality products and services.<br /><br /></li>
<li><strong>Creation of employment opportunity</strong>:<br />Since a business is a social institution, it must create an employment opportunity for the members of the society. Sometimes, this social objective may contradict with economic objective of business.<br /><br /></li>
<li><strong>Refrain from anti-social practice</strong>s: <br />A business has to earn the legitimate profit by showing decent behavior to its customers, supplier’s competitors and other stakeholders. It must not involve in anti-social practices like speculation, hoarding adulteration etc.<br /><br /></li>
<li><strong>Preservation of environment</strong>: <br />A business exists operates and grows in an environment. The growth of the modern business has caused problems of pollution and environmental degradation. So, a business must be aware of the environmental problems and try to protect and preserve the environment by taking appropriate control measures.<br /><br /></li>
<li><strong>Community and social service</strong>: <br />A business must establish a cordial relationship between with the local community where it exists and operates so, it is expected to serve the local community by involving itself in some charitable and social activities to build its public image and goodwill.</li>
</ul>
<h4>Human Objectives</h4>
<p>A business is also a human organization as a number of people are directly or indirectly involved in it to pursue their individual goals. Owners own it, employees and workers work in it, suppliers supply it and consumers buy it and so on. All these people make a valuable contribution to make a business a success.</p>
<ul>
<li><strong>Fair return to owners</strong>: <br />In every business, owner invests their capital in an expectation, that it will bring them some returns. So, a business must try to regularly pay fair returns to the owners capital.<br /><br /></li>
<li><strong>Fair compensation to employees</strong>: <br />Employees are the vital assets of a business the success of a business largely depends on their hard work and efficiency. So they must be fairly compensated for what they deserve.<br /><br /></li>
<li><strong>Welfare of employees:<br /></strong>Since employees put their heart and soul to make a business successful , it must honor the dignity of labor and treat them as partners rather than as simply working hands.<br /><br /></li>
<li><strong>Job Satisfaction:<br /></strong>Employees motivation is important for productivity and profitability of a business. so, a business must ensure job satisfaction of its employees by making their job inherently interesting, challenging and rewarding.<br /><br /></li>
<li><strong>Workers Participation:<br /></strong>A business can also motivate its employees to perform well by ensuring their participation in decision-making. Workers participation does not only lessen their grievances but also improves cordial relations between employers and employees.<br /><br /></li>
<li><strong>Satisfaction of consumers:</strong> <br />It is one of the main objectives of business. A business can ensure the consumers satisfaction by continuously providing them right quality goods and services at the right price at the right time and at the right place.</li>
</ul>
<h4>National Objectives</h4>
<p>Business is an integral part of the nation. So, it must have some objectives to pursue in the interest of the nation of which it is a part. A business must act as an instrument for implementing the national plans programmers and policies for fulfilling national interests.</p>
<ul>
<li><strong>Utilization of natural resources</strong>: <br />Every country is endowed with natural resources which are essential for its development. So, a business must try to properly utilize the indigenous resources which not only reduce imports but also save foreign exchange.<br /><br /></li>
<li><strong>Ensuring Employment</strong>: <br />Every nation has a duty to create jobs to employ its active population. So, it has to create a business-friendly environment where business can boundlessly flourish and thereby can create more and more jobs to the increasing population of the country.<br /><br /></li>
<li><strong>Development the enterprises</strong>:<br />The economic development of a nation depends on the development of both large-scale and small-scale industries . Since, both the industries are complementary to each other , the growth of larger industries is naturally expected to grow many smaller units around them.<br /><br /></li>
<li><strong>Production as per national priorities</strong>: <br />since a business is an instrument for national development, it has to produce such goods and services as needed by the nation. It has to produce goods and services to meet basic necessities of the people.<br /><br /></li>
<li><strong>National Self-sufficiency and export promotion: <br /></strong>Generally, a business is supposed to produce and sell those goods and services which help substitute imports and promote exports. so, a business can ensure national self-sufficiency and contribute to attaining favorable balance payments position.<br /><br /></li>
<li><strong>Balanced Regional Development: <br /></strong>A welfare nation must ensure its balanced regional development. so, a business helps to achieve balanced regional development by investing and utilizing local resources available even in backward and remote areas of the country.</li>
</ul>
<p> </p>
Q3:
Explain any two the objectives of business.
Type: Short Difficulty: Easy
<h4>Organic Objectives</h4>
<p>The first and foremost objective of business are to survive. It seeks to achieve growth and expansion. Then, it further tries to achieve efficiency, stability, recognition prestige, and goodwill.some of points are described below:</p>
<ul>
<li><strong>Surviva</strong>l: <br />For existence and stability, survival is the first motive of a business.Survival is the primary and fundamental objective of every business firm.The business cannot grow until and unless it survives in a competitive business world.<br /><br /></li>
<li><strong>Growth and Diversification</strong>: Business takes place through expansion and diversification. Business growth benefits promoters, shareholders, consumers and the national economy.nce survival is ensured business seeks to achieve growth, expansion, and diversification of its activities.<br /><br /></li>
<li><strong>Prestige and recognition</strong>: <br />Prestige is the respect and admiration that a business earns due to unfailing services to the society.The business firm has to satisfy the human wants of the society. Along with profit it business wants to create a distinct image and goodwill in the market.<br /><br /></li>
<li><strong>Organizational efficiency</strong>: <br />Efficiency is the quality of doing something well with no waste of time and resources.<br /><br /><br /><br /><br /><br /><br /></li>
</ul>
<p><strong>Economic Objectives</strong></p>
<p><br />Business is basically an economic activity. Therefore, its primary objectives are economic in nature.</p>
<ul>
<li><strong>Profit making: </strong><br />Profit is essential for the survival of every business unit.Profit is also necessary for the expansion and growth of business. Profits ensure a continuous flow of capital for the modernisation and extension of business operations in future. No business can survive for long if it suffers losses for some years.<br /><br /></li>
<li><strong> Creating customers:<br /></strong>The customer is the foundation of business and keeps it in existence. Business can create customers by satisfying their needs with right and quantity of goods and services at the right price, at the right time and at the right place.<br /><br /></li>
<li><strong>Innovation:<br /></strong> Innovation is crucial to the continuing success of any organization.. It involves improvements in management, production, selling servicing, methods of personnel and accounting, etc.. In order to create customers business has to explore new markets and attract more cus­tomers. It has also to retain old customers by providing better services to them.<br /><br /></li>
<li><strong>Increase of market share:<br /></strong>Business must outshine its competitors in every aspect of quality, availability and price of goods and services. It must improve its quality of goods and services, reduce its price and improve the distribution system in order to maintain its market standing.</li>
</ul>
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Mechanical Advantage, Velocity Ratio and Efficiency
Mechanical Advantage (MA)
Mechanical advantage is defined as the ratio of resistance overcomes to the effort applied. The simple machine requires force to do work. The resistive force to be overcome is called load and the force applied to overcome the load is called effort.
Velocity Ratio
Velocity ratio of simple machine is the ratio of distance travelled by the effort to the distance travelled by theload in the machine. As velocity ratio or ideal mechanical advantage is a simple ratio of two distances, it also does not have the unit. The friction is not involved in it.
If a machine overcomes a load ‘L’ and the distance travelled by the load is ‘Ld’. Similarly, the effort applied in the machine is ‘E’ and the distance travelled by effort is ‘Ed’, and 'T' is the time taken then
Efficiency
If a machine overcomes a load ‘L’ and the distance travelled by the load is ‘Ld’, the work done by the load is L × Ld. It is also called output work or useful work. Therefore,
Output work = L × Ld
Likewise, the effort applied to overcome the load is E and the distance covered by effort is Ed, the work done by effort is E × Ed. It is also called input work. Therefore,
Input work = E × Ed
The efficiency of a simple machine is defined as the ratio of useful work done by a machine (output work) to the total work put into the machine (input work).
For ideal or perfect machine, work output is equal to the work input. Ideal machines are those imaginary machines which are frictionless. In practice, the work output of a machine is always less than work input due to the effect of friction. If the frictional force in the machine increases the efficiency decreases because machines are frictionless in practice, the efficiency of a machine can never be 100%.
Lesson
Simple Machine
Subject
Science
Grade
Grade 8
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