Class 8 EM CH 8 Session 3
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While friction can be reduced, it can never be entirely eliminated. No surface is perfectly smooth and some irregularities are always present. Rolling friction provides less resistance than sliding friction, which is why machines often use ball bearings to replace sliding and reduce friction through rolling instead.
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Friction ppt
Friction occurs between two surfaces in contact. It acts opposite to the direction of motion and depends on factors like roughness, force between surfaces, and type of motion. Friction produces heat and different types include static, kinetic, sliding, and rolling. It can be reduced using lubricants between surfaces. Lubrication systems in engines use oil to reduce friction between moving parts by forming a separating film. Oil viscosity and properties help with lubrication under different temperatures. Tribology principles can significantly reduce energy consumption and emissions in various industries through improved lubrication and wear reduction technologies.
Friction
Friction is a force that opposes the relative motion between two surfaces in contact. There are four main types of friction: sliding friction, which acts when an object slides along a surface; static friction, which prevents stationary objects from moving; fluid friction, which acts on objects moving through fluids like air or water; and rolling friction, which occurs when a round object like a wheel rolls along a surface. Friction can be useful to enable motion like in walking or driving, but it also leads to wasted energy as heat and additional force needed to overcome it. Lubricants are used to reduce friction in machines.
Friction ppt
Group 3 presented on the topic of friction. Their presentation defined friction as a force that occurs between two surfaces in contact with each other. They discussed the two main types of friction: static friction and kinetic friction. The presentation also listed advantages of friction such as enabling walking and supporting structures, and disadvantages such as energy loss and noise. Finally, they presented several methods for reducing friction such as using lubricants, grease, polishing, or design modifications.
Friction
Friction is the resistance that occurs between two surfaces in contact with each other. There are two types of friction: sliding friction and rolling friction. Friction has both advantages and disadvantages. While it allows us to walk and drive, it also causes wear and tear and wastes energy. Friction can be increased by roughening surfaces and decreased by using lubricants or ball bearings which reduce the contact between surfaces. A working model was proposed to demonstrate increasing and decreasing friction.
Friction
This document discusses friction and the forces involved. It defines friction as the force between two surfaces in contact that are sliding or trying to slide past one another. It describes how static and sliding friction work to either start or keep an object in motion. Examples are given of both the useful and harmful aspects of friction. Methods to increase friction like tread on tires or decrease it like lubricants are outlined. The differences between rolling and sliding friction and how rolling friction is less are explained. Finally, fluid friction is defined and how the shape of objects impacts the frictional forces when moving through fluids.
Year 9 Friction
Friction is the force that opposes the motion of objects in contact. It always acts in the direction opposite to the applied or driving force. Friction can be both useful and problematic. It is useful for applications like braking in vehicles but problematic when it causes objects to get stuck or slows down motion. Friction is greater between rough surfaces than smooth surfaces and can be increased by making surfaces rougher or applying a greater force between them. It can be decreased by lubricating surfaces, changing from sliding to rolling contact, or smoothing surfaces.
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A slide show of the paper- Tribology of artificial joints, T D Stewart BSc PhD Lecturer in Medical Engineering, Institute of Medical and Biological Engineering, The University of Leeds, Leeds, UK, Journal- ORTHOPAEDICS AND TRAUMA 24:6
class 8, chapter -12 friction
you just contact me on my number ( 7023123141 ).
FORM
:- NEW WAY COACHING CLASSES
SHEOGANJ ( SIROHI ) RAJ.
307027
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Friction ppt
Friction occurs between two surfaces in contact. It acts opposite to the direction of motion and depends on factors like roughness, force between surfaces, and type of motion. Friction produces heat and different types include static, kinetic, sliding, and rolling. It can be reduced using lubricants between surfaces. Lubrication systems in engines use oil to reduce friction between moving parts by forming a separating film. Oil viscosity and properties help with lubrication under different temperatures. Tribology principles can significantly reduce energy consumption and emissions in various industries through improved lubrication and wear reduction technologies.
Friction
Friction is a force that opposes the relative motion between two surfaces in contact. There are four main types of friction: sliding friction, which acts when an object slides along a surface; static friction, which prevents stationary objects from moving; fluid friction, which acts on objects moving through fluids like air or water; and rolling friction, which occurs when a round object like a wheel rolls along a surface. Friction can be useful to enable motion like in walking or driving, but it also leads to wasted energy as heat and additional force needed to overcome it. Lubricants are used to reduce friction in machines.
Friction ppt
Group 3 presented on the topic of friction. Their presentation defined friction as a force that occurs between two surfaces in contact with each other. They discussed the two main types of friction: static friction and kinetic friction. The presentation also listed advantages of friction such as enabling walking and supporting structures, and disadvantages such as energy loss and noise. Finally, they presented several methods for reducing friction such as using lubricants, grease, polishing, or design modifications.
Friction
Friction is the resistance that occurs between two surfaces in contact with each other. There are two types of friction: sliding friction and rolling friction. Friction has both advantages and disadvantages. While it allows us to walk and drive, it also causes wear and tear and wastes energy. Friction can be increased by roughening surfaces and decreased by using lubricants or ball bearings which reduce the contact between surfaces. A working model was proposed to demonstrate increasing and decreasing friction.
Friction
This document discusses friction and the forces involved. It defines friction as the force between two surfaces in contact that are sliding or trying to slide past one another. It describes how static and sliding friction work to either start or keep an object in motion. Examples are given of both the useful and harmful aspects of friction. Methods to increase friction like tread on tires or decrease it like lubricants are outlined. The differences between rolling and sliding friction and how rolling friction is less are explained. Finally, fluid friction is defined and how the shape of objects impacts the frictional forces when moving through fluids.
Year 9 Friction
Friction is the force that opposes the motion of objects in contact. It always acts in the direction opposite to the applied or driving force. Friction can be both useful and problematic. It is useful for applications like braking in vehicles but problematic when it causes objects to get stuck or slows down motion. Friction is greater between rough surfaces than smooth surfaces and can be increased by making surfaces rougher or applying a greater force between them. It can be decreased by lubricating surfaces, changing from sliding to rolling contact, or smoothing surfaces.
Tribology in Medicine
A slide show of the paper- Tribology of artificial joints, T D Stewart BSc PhD Lecturer in Medical Engineering, Institute of Medical and Biological Engineering, The University of Leeds, Leeds, UK, Journal- ORTHOPAEDICS AND TRAUMA 24:6
class 8, chapter -12 friction
you just contact me on my number ( 7023123141 ).
FORM
:- NEW WAY COACHING CLASSES
SHEOGANJ ( SIROHI ) RAJ.
307027
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Chapter wise All Notes of First year Basic Civil Engineering.pptx
Chapter wise All Notes of First year Basic Civil Engineering
Syllabus
Chapter-1
Introduction to objective, scope and outcome the subject
Chapter 2
Introduction: Scope and Specialization of Civil Engineering, Role of civil Engineer in Society, Impact of infrastructural development on economy of country.
Chapter 3
Surveying: Object Principles & Types of Surveying; Site Plans, Plans & Maps; Scales & Unit of different Measurements.
Linear Measurements: Instruments used. Linear Measurement by Tape, Ranging out Survey Lines and overcoming Obstructions; Measurements on sloping ground; Tape corrections, conventional symbols. Angular Measurements: Instruments used; Introduction to Compass Surveying, Bearings and Longitude & Latitude of a Line, Introduction to total station.
Levelling: Instrument used Object of levelling, Methods of levelling in brief, and Contour maps.
Chapter 4
Buildings: Selection of site for Buildings, Layout of Building Plan, Types of buildings, Plinth area, carpet area, floor space index, Introduction to building byelaws, concept of sun light & ventilation. Components of Buildings & their functions, Basic concept of R.C.C., Introduction to types of foundation
Chapter 5
Transportation: Introduction to Transportation Engineering; Traffic and Road Safety: Types and Characteristics of Various Modes of Transportation; Various Road Traffic Signs, Causes of Accidents and Road Safety Measures.
Chapter 6
Environmental Engineering: Environmental Pollution, Environmental Acts and Regulations, Functional Concepts of Ecology, Basics of Species, Biodiversity, Ecosystem, Hydrological Cycle; Chemical Cycles: Carbon, Nitrogen & Phosphorus; Energy Flow in Ecosystems.
Water Pollution: Water Quality standards, Introduction to Treatment & Disposal of Waste Water. Reuse and Saving of Water, Rain Water Harvesting. Solid Waste Management: Classification of Solid Waste, Collection, Transportation and Disposal of Solid. Recycling of Solid Waste: Energy Recovery, Sanitary Landfill, On-Site Sanitation. Air & Noise Pollution: Primary and Secondary air pollutants, Harmful effects of Air Pollution, Control of Air Pollution. . Noise Pollution Harmful Effects of noise pollution, control of noise pollution, Global warming & Climate Change, Ozone depletion, Greenhouse effect
Text Books:
1. Palancharmy, Basic Civil Engineering, McGraw Hill publishers.
2. Satheesh Gopi, Basic Civil Engineering, Pearson Publishers.
3. Ketki Rangwala Dalal, Essentials of Civil Engineering, Charotar Publishing House.
4. BCP, Surveying volume 1
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- 1. Quality Education For All
- 2. FRICTION
- 4. Can we reduce friction to zero by polishing surfaces or using large amount of lubricants?
- 5. Friction can never be entirely eleminated. No surface is perfectly smooth. Some irregularities are always there.
- 8. When one body rolls over the surface of another body, the resistance to its motion is called “Rolling friction” Since the rolling friction is smaller than the sliding friction, sliding is replaced in most machines by rolling by the use of ball bearings.