Work Energy & power
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This document defines and explains work, power, and energy. It states that work is defined as the product of force and displacement and can be thought of as the transfer of energy. Power is defined as the rate of doing work and is measured in watts. There are different forms of energy including kinetic, potential, mechanical, electrical, and others. The law of conservation of energy states that the total energy in an isolated system remains constant, even as the forms of energy change within the system.
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Work, Energy and Power
ENERGY AND POWER
This ppt is from XI class CBSE board
Energy
A body which has the capacity to do work is said to possess energy.
For example , water in a reservoir is said to possesses energy as it could be used to drive a turbine lower down the valley. There are many forms of energy e.g. electrical, chemical heat, nuclear, mechanical etc.
The SI units are the same as those for work, Joules J.
In this module only purely mechanical energy will be considered. This may be of two kinds, potential and kinetic.
Power
Power is the rate at which work is done, or the rate at which energy is used transferred.
Equation 3.6
The SI unit for power is the watt W.
A power of 1W means that work is being done at the rate of 1J/s.
Larger units for power are the kilowatt kW (1kW = 1000 W = 103 W) and
the megawatt MW (1 MW = 1000000 W = 106 W).
If work is being done by a machine moving at speed v against a constant force, or resistance, F, then since work doe is force times distance, work done per second is Fv, which is the same as power.
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The document discusses work, energy, and power. It defines key terms like work, force, kinetic energy, potential energy, and mechanical, heat, chemical, electrical, and nuclear energy. It provides examples of calculating work done and energy for objects in motion. The document also defines the unit of power as watts and provides examples of calculating power from scenarios involving work over time. It discusses different forms of energy like heat, internal, and nuclear energy and introduces the mass-energy equivalence relation E=mc2.
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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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1) Work is done when a constant force acts upon an object, causing its kinetic energy to change. Work can be calculated as the product of the force and displacement (W=Fs).
2) Kinetic energy is defined as half the mass of an object multiplied by its velocity squared (Ek=1/2mv^2). Potential energy depends on an object's position or state and is defined as mgh for gravitational potential energy.
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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Explain work, energy and power. The Law of Conservation of Energy is utilized as well as conservative and non conservative systems.
**More good stuff available at:
www.wsautter.com
and
http://www.youtube.com/results?search_query=wnsautter&aq=f
Work,power and energy
1) Work is done when a force causes an object to move through a distance. It is calculated as work = force x distance.
2) There are different types of energy including kinetic energy from motion, potential energy that is stored, and many others from different sources.
3) The law of conservation of energy states that the total energy in an isolated system remains constant, although it can change forms from one to another, such as potential to kinetic energy.
Energy, work and power
This is a summary of the topic "Energy, work and power" in the GCE O levels subject: Physics. Students taking either the combined science (chemistry/physics) or pure Physics will find this useful. These slides are prepared according to the learning outcomes required by the examinations board.
Work power and Energy
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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Work involves the transfer of energy when a force causes an object to move. There are different types of energy, including kinetic energy (related to motion) and potential energy (stored). Elastic potential energy is the potential energy stored when an object is compressed or stretched. The law of conservation of energy states that the total energy in an isolated system remains constant. Power is the rate at which work is done or energy is transferred, measured in watts. Centripetal acceleration is the acceleration felt by an object moving in a circular path towards the center of the circle.
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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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The work-energy theorem states that the net work done on an object by external forces is equal to the change in the object's kinetic and potential energy. It can be applied in three cases:
1) For horizontal motion, the work done by the net force is equal to the change in kinetic energy.
2) For vertical motion under gravity, the work done by gravity is equal to the negative change in potential energy.
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2) There are different types of energy including kinetic energy from motion, potential energy that is stored, and many others.
3) The law of conservation of energy states that the total energy in an isolated system remains constant, although it can change forms from one to another, such as potential to kinetic energy.
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Work is done when a force causes an object to be displaced. Work (W) is equal to force (F) multiplied by displacement (s). Work units are joules. Potential energy is stored energy due to an object's position or state. Kinetic energy is the energy of motion and depends on an object's mass and velocity. Power is the rate at which work is done or energy is converted and is measured in watts. Conservation of energy states that energy cannot be created or destroyed, only changed from one form to another.
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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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Work, Energy and Power
ENERGY AND POWER
This ppt is from XI class CBSE board
Energy
A body which has the capacity to do work is said to possess energy.
For example , water in a reservoir is said to possesses energy as it could be used to drive a turbine lower down the valley. There are many forms of energy e.g. electrical, chemical heat, nuclear, mechanical etc.
The SI units are the same as those for work, Joules J.
In this module only purely mechanical energy will be considered. This may be of two kinds, potential and kinetic.
Power
Power is the rate at which work is done, or the rate at which energy is used transferred.
Equation 3.6
The SI unit for power is the watt W.
A power of 1W means that work is being done at the rate of 1J/s.
Larger units for power are the kilowatt kW (1kW = 1000 W = 103 W) and
the megawatt MW (1 MW = 1000000 W = 106 W).
If work is being done by a machine moving at speed v against a constant force, or resistance, F, then since work doe is force times distance, work done per second is Fv, which is the same as power.
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This document covers concepts related to work, energy, and power. It begins by defining work as the mechanical transfer of energy due to external forces, and is equal to the product of the force and the displacement in the direction of the force. Various examples are provided to illustrate situations where work is and isn't being done. The relationship between work and energy transfer is explained. Kinetic and potential energy are introduced, and analogies are provided. Methods for calculating work, energy, and power are demonstrated through examples.
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The document outlines key concepts related to work, energy, and power including defining these terms, calculating kinetic and potential energy using formulas, stating the principle of conservation of energy as it relates to the conversion of energy forms, applying these concepts to solve related problems, and calculating mechanical system efficiency. The goal is to understand these fundamental physics concepts and be able to measure, calculate and apply work, energy and power.
Ppt on work energy and power class xi science
This document provides a summary of key concepts relating to work, energy, and power. It defines work as the scalar dot product between force and displacement. Kinetic energy is defined using Newton's second law and work-energy theorem states that the net work done on an object equals its change in kinetic energy. Potential energy is defined as being stored when an object is lifted against gravity. The law of conservation of energy is described as energy cannot be created or destroyed, only transformed between potential and kinetic forms. Power is defined as the rate at which energy is used or stored.
Work and energy
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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The document discusses work, energy, and power. It defines key terms like work, force, kinetic energy, potential energy, and mechanical, heat, chemical, electrical, and nuclear energy. It provides examples of calculating work done and energy for objects in motion. The document also defines the unit of power as watts and provides examples of calculating power from scenarios involving work over time. It discusses different forms of energy like heat, internal, and nuclear energy and introduces the mass-energy equivalence relation E=mc2.
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Work in physics
The document defines work in physics as being done when a force causes an object to move through a displacement. It provides the mathematical formula for work as W = Fd, where W is work, F is the applied force, and d is the displacement. It also states that work is a scalar quantity and defines the SI unit of work as the joule. Examples of positive, negative, and zero work are given based on whether the force and displacement are in the same, opposite, or perpendicular directions.
Work and energy. Practical Problems on Work and Energy
1. Work is defined as the product of the applied force and the displacement of an object in the direction of the force. Only the component of force parallel to the object's motion does work.
2. The basic work equation is Work = Force x Displacement. Different types of work problems can involve overcoming friction, gravity, or no forces.
3. Energy is the ability to do work and exists in various forms like kinetic and potential energy. The work-energy theorem states that the work done on an object equals its change in kinetic energy.
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Work is defined as a force acting on an object and moving it through a displacement. It is calculated as work equals force times distance (W=Fd). The SI unit for work is the joule. Work can be positive when force and displacement are in the same direction, negative when they are in opposite directions, and zero when the force is perpendicular to displacement. Power is the rate of doing work and is calculated as work divided by time. Energy is the ability to do work and its SI unit is also the joule.
Work Power and Energy
Work is defined as a force acting on an object and moving it through a displacement. It is calculated as work = force x displacement. The SI unit of work is the joule. Work can be positive when force and displacement are in the same direction, zero when they are perpendicular, and negative when opposite. Power is the rate of doing work and is calculated as power = work/time, with the unit watt equal to joule/second. Energy is the ability to do work and has the unit joule.
Work, Energy and Power for class 10 ICSE Physics
Title: Understanding Work, Energy, and Power
Introduction:
Define work, energy, and power.
Highlight their importance in physics and everyday life.
Content:
Work:
Define work (W = F * d * cos θ).
Discuss its units and significance in energy transfer.
Energy:
Introduce energy and its forms (kinetic, potential, etc.).
Explain the law of conservation of energy.
Kinetic and Potential Energy:
Define kinetic and potential energy.
Provide equations and examples.
Types of Potential Energy:
Gravity Potential Energy.
Elastic Potential Energy.
Include formulas and examples for each.
Power:
Define power (P = W / t).
Discuss its units and difference from work.
Calculating Power:
Examples of power calculations in various contexts.
Applications:
Real-world applications in mechanical devices, renewable energy, and sports.
Conclusion:
Summarize key points and emphasize their significance.
Encourage further exploration.
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The document discusses the concept of work done by a force. It defines work as the product of the force component in the direction of displacement and the displacement distance. Work is positive when force and displacement are in the same direction and negative when they are in opposite directions. The principle of work and energy states that the total work done on a particle equals its change in kinetic energy. Work can be determined by integrating force over displacement for variable forces. Examples of calculating work done by various forces like springs, weights, and friction are provided.
Slide share tst inno
Work is defined as the product of the force applied and the displacement of an object in the direction of the force. Energy is the ability to do work and is measured in joules. There are many types of energy including mechanical, chemical, thermal, and nuclear. Energy can be converted from one form to another. For example, gravitational potential energy can be converted to kinetic energy as an object falls. Mechanical energy, the focus of the document, includes work, which is force times displacement, and power, defined as the rate at which work is done or energy is transferred.
WORK ENERGY AND POWER.ppt class 10th
Work is done when a force causes an object to be displaced. Work equals the force multiplied by the displacement when the force is parallel to the displacement. Work can be positive, negative, or zero depending on the angle between the force and displacement vectors. Potential energy is the energy an object possesses due to its position, shape, or chemical composition and includes gravitational, elastic, electric, and chemical potential energy.
P11.-WORK.ppt
Here are the answers:
1. Work = Force x Distance
= 50N x 10m
= 500 Joules
2. Work = Force x Distance
= Weight x Height
= 45 kg x 9.8 m/s^2 x 1.2m
= 546.4 Joules
3. Total Force = Tom's Force + Jerry's Force = 50N + 70N = 120N
Work = Total Force x Distance
= 120N x 4m
= 480 Joules
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.
WORK, ENERGY & POWER.pptx
1) Work is defined as the application of a force through a displacement. Only the force component acting in the direction of motion does work.
2) When the force and displacement are parallel, work is positive. When they are antiparallel, work is negative. When perpendicular, no work is done.
3) Energy can be in kinetic, potential, or other forms. It is transferred during work. The total energy in a system remains constant due to conservation of energy.
Module No. 10
Work is done when a force causes an object to move through a distance. The work (W) done by a constant force (F) is equal to the force multiplied by the distance (d) moved in the direction of the force: W = Fd. Power is the rate at which work is done, and is calculated as work divided by time. Positive work is when force and motion are in the same direction, negative when they are opposite, and zero when perpendicular. Work and power are important concepts in physics and engineering.
Work ,energy and power
(1) The document discusses different types of energy including kinetic energy, potential energy, and mechanical energy. Mechanical energy is defined as the sum of kinetic and potential energy.
(2) Work is defined as force multiplied by displacement. Work done by a constant force is positive when force acts in the direction of motion and negative when opposite. Potential energy is the energy an object possesses due to its position or state.
(3) Gravitational potential energy near the earth's surface is defined as mgh, where m is the object's mass, g is acceleration due to gravity, and h is the height above a reference level. Gravitational potential energy converts to kinetic energy as an object falls.
6-a-work-energy-power.ppt
1. The document discusses different topics related to work, energy and power including dot product, definitions of work and energy, forms of energy, kinetic energy, work-energy theorem, and potential energy.
2. Key concepts covered are the mathematical definitions of work as the product of force and displacement, and of kinetic energy as one-half mass times velocity squared.
3. The work-energy theorem states that the work done on an object equals its change in kinetic energy, or the work equals the final kinetic energy minus the initial kinetic energy.
'work , energy and power'
This document defines and provides examples of different types of energy, work, and their relationships. It states that work is done when a force causes an object to be displaced, and is calculated as the product of the force and displacement. Kinetic energy is the energy of motion, while potential energy depends on an object's position or state, such as gravitational potential energy which depends on height or elastic potential energy from deformation. Power is defined as the rate at which work is done or energy is delivered over time.
Work
1) Work is defined as a force causing an object to undergo displacement. Work is calculated as the product of the force (F) and displacement (d) in the same direction.
2) If the force is not parallel to the displacement, only the component of the force parallel to displacement does work. Work is then calculated as F1 times d, where F1 is the parallel component of force.
3) Work can be positive, negative or zero. Positive work occurs when force and displacement are in the same direction. Negative work occurs when they are in opposite directions. Zero work occurs when force is perpendicular to displacement.
Work
1) Work is defined as a force causing an object to undergo displacement. Work is calculated as the product of the force (F) and displacement (d) in the same direction.
2) If the force is not parallel to the displacement, only the component of the force parallel to displacement does work. Work is then calculated as F1 times d, where F1 is the parallel component of force.
3) Work can be positive, negative or zero. Positive work occurs when force and displacement are in the same direction. Negative work occurs when they are in opposite directions. Zero work occurs when force is perpendicular to displacement.
Work and energy
The document discusses various topics relating to work, energy and motion. It defines kinetic energy and potential energy, and explains how work is the transfer of energy associated with the application of a force over a distance. It also discusses conservation of energy, power, centripetal force and circular motion. Examples are provided to illustrate these concepts in practical applications like a roller coaster or cart moving down a hill.
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Work Energy & power
- 2. WORK,ENERGY & POWER SHAHBAZ AHMED 15CH44
- 3. Work: • When a force acts on a body in such a way that body covers some displacement, it is called work. • Work(W) is defined as a product of force(F) and displacement(d) • Work can be defined as transfer of energy. • Work is scalar quantity. • InSI unit of work is Joule( J ). J=N×m • If force makes an angle with the direction of motion, then for finding work done, that component of force will be taken which acts in the direction of motion(Fcos ) .W=F cos d • W=F cos d
- 4. Continue… • (A) When direction of force and displacement is same the work done is positive • (B) When direction of force and displacement is opposite the work done is negative. • (C) When force and displacement are mutually perpendicular to each other the work done is zero.
- 5. POWER : • The rate of doing work is known as power. Power= 𝑤𝑜𝑟𝑘 𝑡𝑖𝑚𝑒 • Power is a scalar quantity. • Unit of Power is watt or J/s. • Other common unit is horse power. • 1hp=746Watt.
- 6. Energy: The ability of doing work is called Energy. In SI units energy is measured in Joule(J). Energy is scalar quantity.
- 7. ENERGY Mechanical Non- Mechanical Kinetic Potential Linear Rotational Gravitational Elastic Electric Magnetic Light Sound Heat
- 8. Law of Conservation of energy • Statement=Energy is neither created nor destroyed, but one form of energy is converted into an other form of energy, so total energy of the system remains constant. • Explanation= In an isolated system from the motion of the pendulum above law of conservation of energy is proved in following way. P.E=100J K.E= OJ P.E= O J K.E = 100 J A B