Lubrication is a key process in maintaining a machine that affects performance and smoothness. Once it is lubricated with oil, the machine minimizes friction between moving parts. Friction causes wearing and tearing on components that may slowly degrade, affecting the overall working of the machine.Read more
Lubrication is a key process in maintaining a machine that affects performance and smoothness. Once it is lubricated with oil, the machine minimizes friction between moving parts. Friction causes wearing and tearing on components that may slowly degrade, affecting the overall working of the machine. Applying a lubricant allows the surfaces of the machine to slide past one another more effortlessly, reducing resistance for smoother operations.
One of the main advantages of lubrication is the increase in mechanical efficiency. As friction decreases, less energy is wasted as heat, meaning that more of the input energy can be converted into useful work. This leads to a more efficient machine that can perform its tasks with less energy consumption. Although the mechanical efficiency improves due to reduced friction, the mechanical advantage remains unchanged. The ratio of the output force created by the machine to the input force applied on it is termed as mechanical advantage. This would indicate the magnitude to which a machine amplifies force, and lubrication doesn’t directly impact this property.
In short, proper lubrication improves a machine’s mechanical efficiency by reducing friction, hence causing it to work more smoothly while conserving energy.
Angular momentum is the rotational motion of an object, measured about some axis. The product of moment of inertia of an object and its angular velocity is called its angular momentum. In simple terms, angular momentum is the measure of how much motion a rotating body has, as well as how much resistRead more
Angular momentum is the rotational motion of an object, measured about some axis. The product of moment of inertia of an object and its angular velocity is called its angular momentum. In simple terms, angular momentum is the measure of how much motion a rotating body has, as well as how much resistance it offers against changes in its motion.
The conservation principle, in this context, is why angular momentum matters. In such a closed system, where it has no externally applied torques, the overall angular momentum cannot change. Such a principle remains very important to analyze the dynamical behavior of rotating bodies.
The SI unit of angular momentum is kilogram meter squared per second. This quantity, therefore, has a standard measurement unit for quantifying angular momentum in different physical systems. Besides that, one can express the dimensions of angular momentum in terms of mass, length, and time, emphasizing its dependence on these fundamental quantities.
Angular momentum is the key to understanding many aspects of physics, from mechanics and astrophysics to engineering. It is vital for the analysis of systems which are rotating: planets orbiting stars, spinning tops, particles in quantum mechanics, and more. In short, angular momentum is an important tool in the description and prediction of rotating objects.
To find the point where the gravitational field due to Earth equals the gravitational field due to the Moon at a point C, we start by considering the gravitational influences of both celestial bodies. Let’s denote the mass of Earth as M and the mass of the Moon as M/81 since the Moon's mass is approRead more
To find the point where the gravitational field due to Earth equals the gravitational field due to the Moon at a point C, we start by considering the gravitational influences of both celestial bodies. Let’s denote the mass of Earth as M and the mass of the Moon as M/81 since the Moon’s mass is approximately one-eighty-first of Earth’s mass. The distance from the center of the Earth is represented as 60R, where R is the radius of the Earth.
At point C, we want the gravitational fields from both Earth and the Moon to balance each other. By establishing the relationship between the gravitational fields and the distances involved, we derive that the distance x from the center of the Moon is critical for determining this balance.
Solving for x leads us to a relationship indicating that x equals (6R). This means that the point C, where the gravitational fields are equal, is located 6 times the Earth’s radius away from the center of the Earth. This solution illustrates the gravitational interactions between the Earth and the Moon and highlights the unique balance of forces in space.
Gravitational field due to earth at C = Gravitational field due to moon at C or
GM/(60 R – x)² = G(M/81)/x²
or 81x² = (60 R -x)²
or 9x = 60 R – x
or x = 6 R
In contemporary agriculture, ploughing has evolved significantly with the adoption of modern technology. Traditional wooden ploughs, drawn by animals, have largely been replaced by tractor-driven cultivators. These cultivators are efficient, saving both labor and time in comparison to manual ploughiRead more
In contemporary agriculture, ploughing has evolved significantly with the adoption of modern technology. Traditional wooden ploughs, drawn by animals, have largely been replaced by tractor-driven cultivators. These cultivators are efficient, saving both labor and time in comparison to manual ploughing methods. The use of iron ploughs has become prevalent, enhancing precision and effectiveness in soil preparation.
Mechanized ploughing allows for greater control over depth and speed, contributing to improved cultivation practices. Overall, the integration of technology, particularly tractor-driven cultivators, has revolutionized the ploughing process, making it a cornerstone of modern and efficient agricultural practices.
In agriculture, a hoe serves the crucial functions of removing weeds and loosening the soil around crops. It consists of a long rod made of wood or iron, with a sturdy, broad, and bent plate of iron fixed at one end. This plate, often shaped like a paddle, is the working part of the hoe and is usedRead more
In agriculture, a hoe serves the crucial functions of removing weeds and loosening the soil around crops. It consists of a long rod made of wood or iron, with a sturdy, broad, and bent plate of iron fixed at one end. This plate, often shaped like a paddle, is the working part of the hoe and is used to cut through soil and uproot weeds.
The length and design of the hoe allow farmers to perform these tasks efficiently while standing, providing a manual and versatile tool for maintaining the soil around crops, promoting better growth, and enhancing overall crop yield.
If a machine is lubricated with oil
Lubrication is a key process in maintaining a machine that affects performance and smoothness. Once it is lubricated with oil, the machine minimizes friction between moving parts. Friction causes wearing and tearing on components that may slowly degrade, affecting the overall working of the machine.Read more
Lubrication is a key process in maintaining a machine that affects performance and smoothness. Once it is lubricated with oil, the machine minimizes friction between moving parts. Friction causes wearing and tearing on components that may slowly degrade, affecting the overall working of the machine. Applying a lubricant allows the surfaces of the machine to slide past one another more effortlessly, reducing resistance for smoother operations.
One of the main advantages of lubrication is the increase in mechanical efficiency. As friction decreases, less energy is wasted as heat, meaning that more of the input energy can be converted into useful work. This leads to a more efficient machine that can perform its tasks with less energy consumption. Although the mechanical efficiency improves due to reduced friction, the mechanical advantage remains unchanged. The ratio of the output force created by the machine to the input force applied on it is termed as mechanical advantage. This would indicate the magnitude to which a machine amplifies force, and lubrication doesn’t directly impact this property.
In short, proper lubrication improves a machine’s mechanical efficiency by reducing friction, hence causing it to work more smoothly while conserving energy.
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See lesshttps://www.tiwariacademy.com/ncert-solutions/class-11/physics/chapter-5/
Define the term angular momentum. Give its units and dimensions.
Angular momentum is the rotational motion of an object, measured about some axis. The product of moment of inertia of an object and its angular velocity is called its angular momentum. In simple terms, angular momentum is the measure of how much motion a rotating body has, as well as how much resistRead more
Angular momentum is the rotational motion of an object, measured about some axis. The product of moment of inertia of an object and its angular velocity is called its angular momentum. In simple terms, angular momentum is the measure of how much motion a rotating body has, as well as how much resistance it offers against changes in its motion.
The conservation principle, in this context, is why angular momentum matters. In such a closed system, where it has no externally applied torques, the overall angular momentum cannot change. Such a principle remains very important to analyze the dynamical behavior of rotating bodies.
The SI unit of angular momentum is kilogram meter squared per second. This quantity, therefore, has a standard measurement unit for quantifying angular momentum in different physical systems. Besides that, one can express the dimensions of angular momentum in terms of mass, length, and time, emphasizing its dependence on these fundamental quantities.
Angular momentum is the key to understanding many aspects of physics, from mechanics and astrophysics to engineering. It is vital for the analysis of systems which are rotating: planets orbiting stars, spinning tops, particles in quantum mechanics, and more. In short, angular momentum is an important tool in the description and prediction of rotating objects.
Click here for more: – https://www.tiwariacademy.com/ncert-solutions/class-11/physics/chapter-6/
See lessKnowing that mass of moon M/81 (where M is the mass if earth), find the distance of the point, where gravitational field due to earth and moon cancel each other. Given that the distance between the earth and moon is 60 R, where is the radius of earth.
To find the point where the gravitational field due to Earth equals the gravitational field due to the Moon at a point C, we start by considering the gravitational influences of both celestial bodies. Let’s denote the mass of Earth as M and the mass of the Moon as M/81 since the Moon's mass is approRead more
To find the point where the gravitational field due to Earth equals the gravitational field due to the Moon at a point C, we start by considering the gravitational influences of both celestial bodies. Let’s denote the mass of Earth as M and the mass of the Moon as M/81 since the Moon’s mass is approximately one-eighty-first of Earth’s mass. The distance from the center of the Earth is represented as 60R, where R is the radius of the Earth.
At point C, we want the gravitational fields from both Earth and the Moon to balance each other. By establishing the relationship between the gravitational fields and the distances involved, we derive that the distance x from the center of the Moon is critical for determining this balance.
Solving for x leads us to a relationship indicating that x equals (6R). This means that the point C, where the gravitational fields are equal, is located 6 times the Earth’s radius away from the center of the Earth. This solution illustrates the gravitational interactions between the Earth and the Moon and highlights the unique balance of forces in space.
Gravitational field due to earth at C = Gravitational field due to moon at C or
See lessGM/(60 R – x)² = G(M/81)/x²
or 81x² = (60 R -x)²
or 9x = 60 R – x
or x = 6 R
How has ploughing evolved with modern technology, and what is used for ploughing in contemporary agriculture?
In contemporary agriculture, ploughing has evolved significantly with the adoption of modern technology. Traditional wooden ploughs, drawn by animals, have largely been replaced by tractor-driven cultivators. These cultivators are efficient, saving both labor and time in comparison to manual ploughiRead more
In contemporary agriculture, ploughing has evolved significantly with the adoption of modern technology. Traditional wooden ploughs, drawn by animals, have largely been replaced by tractor-driven cultivators. These cultivators are efficient, saving both labor and time in comparison to manual ploughing methods. The use of iron ploughs has become prevalent, enhancing precision and effectiveness in soil preparation.
See lessMechanized ploughing allows for greater control over depth and speed, contributing to improved cultivation practices. Overall, the integration of technology, particularly tractor-driven cultivators, has revolutionized the ploughing process, making it a cornerstone of modern and efficient agricultural practices.
What is the function of a hoe in agriculture, and what are its components?
In agriculture, a hoe serves the crucial functions of removing weeds and loosening the soil around crops. It consists of a long rod made of wood or iron, with a sturdy, broad, and bent plate of iron fixed at one end. This plate, often shaped like a paddle, is the working part of the hoe and is usedRead more
In agriculture, a hoe serves the crucial functions of removing weeds and loosening the soil around crops. It consists of a long rod made of wood or iron, with a sturdy, broad, and bent plate of iron fixed at one end. This plate, often shaped like a paddle, is the working part of the hoe and is used to cut through soil and uproot weeds.
See lessThe length and design of the hoe allow farmers to perform these tasks efficiently while standing, providing a manual and versatile tool for maintaining the soil around crops, promoting better growth, and enhancing overall crop yield.