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 the law of conservation of energy and defines power as the rate of doing work or using energy, with units of joules per second or watts.
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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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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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2) For vertical motion under gravity, the work done by gravity is equal to the negative change in potential energy.
3) In general, the work done by non-conservative forces is equal to the change in total mechanical energy, which is the sum of the changes in kinetic and potential energy.
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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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www.wsautter.com
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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 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
work and energy
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
11workandenergy(1).pdf for environmental science
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
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.
Work and Energy
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.
2.3 work, energy & power 2017
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.
WEEK_7_WORKPOWER_AND_ENERGY_PPT.pptx
Work is the amount of energy transferred by a force acting on an object through a distance in the direction of the force. For work to be done, there must be a force acting on an object, the object must be displaced some distance, and the force must be parallel to the displacement. Power is the rate at which work is done, or the amount of work done per unit of time. Energy is the ability to do work and exists in various forms, including kinetic energy from motion and potential energy from position or stress. The document provides examples of calculating work, power, kinetic energy, potential energy, elastic potential energy, momentum, and impulse based on given values.
class 9 chapter 11 work and energy very helpful presentation
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.
T - Work, Power & Energy
Work is defined as the product of the force applied and the distance moved in the direction of the force. Positive work is when movement is in the direction of the force, and negative when against it. Power is the rate at which work is done, defined as work divided by time. There are two types of mechanical energy: kinetic energy, which is the energy from motion; and potential energy, which is the energy from height or stored energy. The law of conservation of energy states that energy cannot be created or destroyed, only changed from one form to another.
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.
Work-and-Energy.pptx
- Energy is the ability to do work and exists in various forms such as potential and kinetic energy. Potential energy is the stored energy of an object due to its position or state.
- Gravitational potential energy is the energy possessed by an object due to its height and is calculated as PE = mgh. Elastic potential energy is the energy stored in stretched or compressed springs and is calculated as PE = 1/2kx^2.
- Examples are provided to demonstrate calculating the gravitational and elastic potential energy of various objects based on their mass, height, spring constant, and displacement from equilibrium.
work and energy
This document discusses work, energy, and their related concepts. It defines work as force times displacement, with units of joules. Kinetic energy is defined as one-half mass times velocity squared and depends on an object's motion. Potential energy is defined as mass times gravitational field strength times height, and depends on an object's position or shape. The law of conservation of energy states that energy cannot be created or destroyed, only transformed between forms. Power is defined as the rate of doing work, or work per unit time, with units of watts.
Ch 6 Work & Energy
This document provides an overview of key concepts in work, energy, and power. It defines work and explains how to calculate work done by constant and variable forces. It introduces the concepts of kinetic and potential energy, and establishes the work-energy theorem. It distinguishes between conservative and non-conservative forces, and explains how the conservation of mechanical energy applies or does not apply in different situations. It also defines power and provides examples of calculating power.
Lecture Ch 06
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.
Similar to Work and energy by ayushman maheswari (20)
class 9 chapter 11 work and energy very helpful presentation
class 9 chapter 11 work and energy very helpful presentation
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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: