Work and energy by ayushman maheswari
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This document provides information about work, energy, and power. It defines work as force times displacement and discusses different types of energy including kinetic energy, which is the energy from an object's motion, and potential energy, which is stored energy from an object's position or compression. Kinetic energy is calculated as half mass times velocity squared, while potential energy from height is mass times gravitational acceleration times height. The document also states that the total mechanical energy of a system is the sum of its kinetic and potential energies, and that energy is conserved according to the law of conservation of energy. Power is defined as the rate of doing work or using energy, with units of watts, and examples of power calculations are provided.
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work and energy
This document provides an introduction to work, energy, and their related concepts. It defines work as the dot product of force and displacement, with units of joules. There can be positive, negative, or zero work depending on the direction of force and displacement. Energy is defined as the ability to do work and is also measured in joules. Mechanical energy is the sum of kinetic energy (1/2mv^2) and potential energy. The work-energy theorem states that work done equals the change in kinetic energy. The law of conservation of energy says energy cannot be created or destroyed, only transferred between forms. Power is defined as the rate of work or energy transfer over time, with units of watts.
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This document discusses concepts related to work, energy, and power in physics. It defines kinetic energy and explains the conservation of energy and mechanical energy. Work is defined as the transfer of energy by a force acting along an object's path of motion. The work-energy theorem states that the work done on an object equals its change in kinetic energy. Power is the rate at which work is done or energy is transferred, with the mathematical definition being the work done divided by the time taken.
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Work is defined as the displacement of an object multiplied by the component of the force acting on the object parallel to the displacement. Work can change an object's kinetic energy or potential energy, but the total energy in an isolated system remains constant. Conservative forces, like gravity, do not change the total energy and only depend on the start and end points of motion. Non-conservative forces, like friction, can change the total energy by transferring it to other forms like heat.
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1. Energy is the ability to cause change. It exists in various forms including kinetic energy (related to motion) and potential energy (stored energy).
2. Kinetic energy depends on an object's mass and speed, and can be calculated as KE = 1/2mv^2. Potential energy includes gravitational potential energy (GPE), which depends on mass and height/position, calculated as GPE = mgh.
3. The law of conservation of energy states that energy can never be created or destroyed, only transferred or changed from one form to another. Mechanical energy equals the sum of an object's kinetic and potential energies.
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The document discusses work, energy, and power. It defines work as a force causing an object to move through a distance. The amount of work done depends on the force and distance. Work is calculated as W=FΔx. It also defines kinetic energy as the energy from an object's motion, calculated as KE=1/2mv^2. Potential energy is defined as energy from an object's position. Gravitational potential energy is calculated as GPE=mgh. The law of conservation of energy states that energy cannot be created or destroyed, only transferred or transformed between kinetic and potential forms. Power is defined as the rate of energy transfer or transformation over time, calculated as P=ΔE/Δt
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The document discusses various topics relating to work, energy, and power in physics. It defines work, kinetic energy, gravitational potential energy, and conservation of energy. It provides examples of calculating work, kinetic energy, changes in potential energy, and applying the work-energy principle and conservation of energy to problems involving objects moving under gravitational and other forces. It also defines power and provides examples of calculating power required to climb stairs, accelerate a car, and overcome forces like friction and air resistance.
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This document discusses basic energy concepts including work, kinetic energy, potential energy, and the law of conservation of energy. It provides equations to calculate work (W=FΔx), kinetic energy (KE=1/2mv^2), and gravitational potential energy (GPE=mgh). Examples are given to demonstrate calculating energy transformations during events like a swing or skydiving fall. The key points are that energy cannot be created or destroyed, only transformed between kinetic and potential forms, and this transformation can be represented using energy bar charts.
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The document discusses how forces affect the velocity and acceleration of objects. It introduces concepts of work, potential energy, kinetic energy, and conservation of energy. It provides equations for work, potential energy, kinetic energy, power, and efficiency. It explains that acceleration depends on both force and mass, as shown in the equation Force = Mass x Acceleration. The document also discusses gravitational field, noting that gravitational field strength and acceleration due to gravity are the same and can be derived from F = ma. It presents equations relating potential energy, kinetic energy, and velocity during energy changes.
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This document provides an introduction to work, energy, and their related concepts. It defines work as the dot product of force and displacement, with units of joules. There can be positive, negative, or zero work depending on the direction of force and displacement. Energy is defined as the ability to do work and is also measured in joules. Mechanical energy is the sum of kinetic energy (1/2mv^2) and potential energy. The work-energy theorem states that work done equals the change in kinetic energy. The law of conservation of energy says energy cannot be created or destroyed, only transferred between forms. Power is defined as the rate of work or energy transfer over time, with units of watts.
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This document discusses concepts related to work, energy, and power in physics. It defines kinetic energy and explains the conservation of energy and mechanical energy. Work is defined as the transfer of energy by a force acting along an object's path of motion. The work-energy theorem states that the work done on an object equals its change in kinetic energy. Power is the rate at which work is done or energy is transferred, with the mathematical definition being the work done divided by the time taken.
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Work is defined as the displacement of an object multiplied by the component of the force acting on the object parallel to the displacement. Work can change an object's kinetic energy or potential energy, but the total energy in an isolated system remains constant. Conservative forces, like gravity, do not change the total energy and only depend on the start and end points of motion. Non-conservative forces, like friction, can change the total energy by transferring it to other forms like heat.
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1. Energy is the ability to cause change. It exists in various forms including kinetic energy (related to motion) and potential energy (stored energy).
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3. The law of conservation of energy states that energy can never be created or destroyed, only transferred or changed from one form to another. Mechanical energy equals the sum of an object's kinetic and potential energies.
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The document discusses work, energy, and power. It defines work as a force causing an object to move through a distance. The amount of work done depends on the force and distance. Work is calculated as W=FΔx. It also defines kinetic energy as the energy from an object's motion, calculated as KE=1/2mv^2. Potential energy is defined as energy from an object's position. Gravitational potential energy is calculated as GPE=mgh. The law of conservation of energy states that energy cannot be created or destroyed, only transferred or transformed between kinetic and potential forms. Power is defined as the rate of energy transfer or transformation over time, calculated as P=ΔE/Δt
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and
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Allah created natural beauty. Natural beauty includes Glen Canyon Dam on the Colorado River, which demonstrates tremendous water pressure. Work is defined as the force applied over a distance in the same direction, and is measured in joules. Work is a scalar quantity despite force and displacement being vectors.
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Work is done when a force causes an object to move in the direction of the force. Work is measured in joules, which is equal to applying a force of 1 newton over a distance of 1 meter. Power is the rate at which work is done and is measured in watts. The work-energy theorem states that work done on an object transforms into a change in the object's kinetic energy. Various types of energy, such as gravitational potential energy, kinetic energy, and heat can be transformed into one another but the total amount of energy remains constant due to the law of conservation of energy.
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Work is defined scientifically as the product of the applied force and the displacement in the direction of the force. Work is done when a force causes an object to move, such as lifting a book or pushing it across a table. No work is done if there is no displacement, such as pushing against a wall. Work has the SI unit of joules. Energy exists in various forms including kinetic, potential, mechanical, electrical, chemical, and nuclear. The law of conservation of energy states that energy cannot be created or destroyed, only transformed from one form to another within a closed system.
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This document is from the LUIT Valley Academy in Jorhat, Assam and was created by a group of six students called "The Forwarders" under the guidance of Dr. Sanjan Hazarika. It discusses the concepts of work, energy, momentum, power, and their relationships. It defines work as the product of force and displacement and discusses the units of work. It also covers the different types of work, conservation of mechanical energy, and provides examples of converting between different forms of energy.
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1) The document discusses concepts related to work, kinetic energy, and potential energy including gravitational potential energy, elastic potential energy, and the conservation of mechanical energy.
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This document provides definitions and explanations of key concepts related to work, energy, and power:
1) Work is done when a force causes an object to be displaced in the direction of the force. Work is measured in joules, which is the work done by a force of 1 newton over a displacement of 1 meter.
2) Energy is the ability of an object to do work and is also measured in joules. There are different forms of energy including kinetic, potential, chemical, and mechanical energy.
3) Kinetic energy is the energy an object possesses due to its motion and depends on the object's mass and speed. Potential energy is the stored energy an object possesses due to its position
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This document provides definitions and explanations of key concepts related to work, energy, and power:
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2) Energy is the ability of an object to do work and is also measured in joules. There are different forms of energy including kinetic, potential, chemical, and mechanical energy.
3) Kinetic energy is the energy an object possesses due to its motion and depends on the object's mass and speed. Potential energy is the stored energy an object possesses due to its position
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1. Work is done when a force causes an object to be displaced in the direction of the force. Work is calculated as force multiplied by displacement. Work can be positive, negative, or zero depending on the relationship between the force and displacement.
2. Energy is the ability to do work and is measured in joules. There are different forms of energy including mechanical, chemical, and electrical energy. Mechanical energy consists of kinetic energy and potential energy. Kinetic energy depends on an object's motion or speed, while potential energy depends on an object's position or shape.
3. Energy can be transferred and transformed between different forms, but the total amount of energy remains the same according to the law of conservation
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A simple ppt yet interactive on the topic work power and energy. With smooth design and looks the ppt is very good for clearing the basics related to this topic, hope it will help you further.
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1. Work is done when a force causes an object to be displaced in the direction of the force. Work is calculated as force multiplied by displacement.
2. Energy is the ability of an object to do work and is measured in joules. There are different forms of energy including kinetic, potential, chemical, and mechanical energy.
3. Kinetic energy is the energy an object possesses due to its motion and depends on the object's mass and speed. Potential energy is stored energy due to an object's position or shape, such as from raising an object vertically or compressing a spring.
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Allah created natural beauty. Natural beauty includes Glen Canyon Dam on the Colorado River, which demonstrates tremendous water pressure. Work is defined as the force applied over a distance in the same direction, and is measured in joules. Work is a scalar quantity despite force and displacement being vectors.
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A simple ppt yet interactive on the topic work power and energy. With smooth design and looks the ppt is very good for clearing the basics related to this topic, hope it will help you further.
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3) Energy is always conserved in an isolated system. As one form of energy decreases, another form increases such that the total energy remains the same. Machines can convert energy into useful work but some energy is always lost to heat.
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This document provides an overview of work, energy, and power. It defines work as force multiplied by displacement and defines the joule as the unit of work. It describes kinetic energy as the energy of motion and potential energy as stored energy due to position or shape. It states that energy can change forms through transformation but the total amount remains constant according to the law of conservation of energy. Finally, it defines power as the rate of doing work and commercial units like the kilowatt hour.
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1) Chapter 6 discusses work, energy, and power, defining kinetic energy as the energy of motion and potential energy as energy associated with positional forces.
2) The work-energy principle states that the net work done on an object equals its change in kinetic energy. For conservative forces only, the total mechanical energy is conserved.
3) Power is defined as the rate at which work is done or energy is transferred. Units of power include watts and horsepower.
Third ppt
The document discusses concepts related to work, energy and power in physics. It defines work as the product of force and displacement. Kinetic energy is defined as the energy an object possesses due to its motion. The law of conservation of energy states that energy cannot be created or destroyed, only transferred or changed from one form to another. Thermal energy is the energy contained within a system that is responsible for its temperature and is produced from friction. Power is defined as the rate of doing work or using energy and is measured in watts. Several examples of calculations related to work, energy and power are also presented.
Work and Energy.pptx [repaired]
1) The document discusses work, energy, and their relationship through the work-energy theorem. It defines work as the product of force and displacement and distinguishes between different types of work.
2) Kinetic energy and potential energy are also defined. Kinetic energy is defined as 1/2 mv^2 and potential energy as mgh.
3) The principle of conservation of energy is explained, stating that the total energy in a system remains constant, and energy can change forms but not be created or destroyed.
4) Examples are provided to demonstrate calculating work, kinetic energy, and potential energy in different scenarios. The work-energy theorem is also illustrated as showing the relationship between change in kinetic and
Work and energy
This document provides information about work and energy covered in class 9th C. It discusses various topics like concept of work, factors on which amount of work depends, positive and negative work, zero work, different forms of energy, mechanical energy, kinetic energy and potential energy. Examples are given to explain these concepts in detail. The document also provides units of work, power and energy.
02 UNIT-2 (WORK & ENERGY) .pptx
The document summarizes key concepts about work and energy:
- Work is the product of the force component in the direction of displacement and the displacement distance. It can be positive, zero, or negative depending on the angle between the force and displacement vectors.
- Energy is the ability to do work and exists in various forms including mechanical, electrical, chemical, and others. Mechanical energy includes kinetic energy and potential energy.
- The work-energy principle states that work done on an object equals its change in kinetic energy. This allows calculating work from changes in speed or kinetic energy.
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class 9 chapter 11 work and energy very helpful presentation
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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.
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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.
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Work and energy by ayushman maheswari
- 1. WORK & ENERGYWORK & ENERGY AYUSHMAAN MAHESWARI VISHALTRIPATHI ROHAN BAGHEL ANUJ CHAUHAN CLASS- 9 B GROUP NO.- 3 G.L.T. SARASWATI BAL MANDIR
- 2. INDEX:-INDEX:- 1. WORK 2. ENERGY i. KINETIC ENERGY ii. POTENTIAL ENERGY 3. POWER
- 3. 1.1. WORK:-WORK:- Work is said to be done only when a force act on an object which displaces it or which causes the object to move. Work done = Force x Displacement W = F s where W= work done F = force s = Displacement
- 4. In the SI system, the units of work are joules. 1 J = 1 Nm. E.g.- W=F s W=100 N*5m W=500Nm
- 5. Energy:-Energy:- ENERGY is the capability of doing work. An object having the capability to do work is said to posses energy. The object which does the work loses energy and the object on which the work is done gains energy. Any object that possesses energy can do work.
- 6. The unit of energy is the same as that of work. i.e. joule (J) Different forms of ENERGY.- 1.Mechanical Energy (Potential Energy + Kinetic Energy) 2.Heat Energy 3.Chemical Energy 4.Electrical Energy 5.Light Energy
- 7. 1.1. Kinetic Energy:-Kinetic Energy:- The kinetic energy of an object is the energy which it possesses due to its motion. We define the kinetic energy:- ∆KE = W = F x d= m a h=1/2 mv2
- 8. • If the net work is positive, the kinetic energy increases. • If the net work is negative, the kinetic energy decreases. e.g.- Find the kinetic energy of an 4 Kg object moving at 5m/s. KE = 1/2 mv2 KE = ½ (4Kg)(5m/s) 2 KE = 50 Kg m 2 /s 2 KE = 50 J
- 9. 2.2. POTENTIAL ENERGY:-POTENTIAL ENERGY:- Potential energy is energy that is stored within a system. This force is often called a restoring force. PE = W = F x d = m a h Familiar examples of potential energy: • A wound-up spring • A stretched elastic band • An object at some height above the ground
- 10. In raising a mass m to a height h, the work done by the external force is Therefore define the gravitational potential energy:
- 11. The energy of motion ∆KE = W = F x d = m a h=1/2 mv2 Find the kinetic energy of an 4 Kg object moving at 5m/s. KE = 1/2 mv2 KE = ½ (4Kg)(5m/s) 2 KE = 50 Kg m 2 /s 2 KE = 50 J
- 12. Potential energy can also be stored in a spring when it is compressed; the figure below shows potential energy yielding kinetic energy.
- 13. The force required to compress or stretch a spring is: where k is called the spring constant, and needs to be measured for each spring.
- 14. If there are no non-conservative forces, the sum of the changes in the kinetic energy and in the potential energy is zero – the kinetic and potential energy changes are equal but opposite in sign. This allows us to define the total mechanical energy:
- 15. Potential Energy is maximum at the maximum HEIGHT
- 16. Law of conservation of energyLaw of conservation of energy Energy cannot be created or destroyed; hence energy can not disappear.
- 17. POWER:-POWER:- Power is the rate that we use energy. Power = Work or Energy / Time P = W/t = F x d/t = F v The units for power : ◦ J/s ◦ Kg m2 / s2 /s ◦ N m / s
- 18. In the SI system, the units of power are watts: A 5 Kg Cart is pushed by a 30 N force against friction for a distance of 10m in 5 seconds. Determine the Power needed to move the cart. P = F x d / t P = 30 N (10 m) / 5 s P = 60 N m /s P = 60 watts
- 19. Power is also needed for acceleration and for moving against the force of gravity. The average power can be written in terms of the force and the average velocity: