Work energy power 2 reading assignment -revision 1
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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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Work energy power 2 reading assignment -revision 2 physics
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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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.
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.
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.
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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.
Work, energy & power physics
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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This document discusses kinetic energy. It defines kinetic energy as the energy of a moving object or energy in motion. The formula for calculating kinetic energy is provided as KE = 1/2mv^2, where m is mass and v is velocity. Examples are given to show how doubling mass doubles kinetic energy, while doubling velocity quadruples kinetic energy. The document also provides an example calculation of the kinetic energy of a 0.10 kg bird flying at 8.0 m/s.
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The document discusses the law of conservation of mechanical energy and provides examples of energy transfers. It states that energy cannot be created or destroyed, only converted between different forms. For a roller coaster problem, it shows the steps to find the velocity at different points by equating the initial potential energy to the subsequent forms of energy, using appropriate equations.
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Work energy power 2 reading assignment -revision 2 physics
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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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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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.
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The document discusses the laws of conservation of mechanical energy and work and energy. It provides formulas and an example problem. The key points are:
1) The law of conservation of mechanical energy states that when gravity is the only external force, the total mechanical energy of an object remains constant. The energy is the sum of potential energy and kinetic energy.
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Kinetic energy is the energy of motion and is calculated as K = 1/2 mv^2, where m is mass and v is velocity. Doubling speed quadruples kinetic energy, and tripling speed multiplies it by nine. The SI unit for kinetic, potential, and all other types of energy is the Joule. Potential energy depends on mass, gravitational field strength, and height. The total energy before and after an energy transformation will be equal according to the law of conservation of energy. Work is the product of force and displacement and can be positive, negative, or zero depending on the direction of force relative to motion.
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Kinetic energy is the energy of motion and is calculated using the equation K=1/2mv^2. The greater the mass or speed, the more kinetic energy an object has. Kinetic energy has SI units of joules. Gravitational potential energy is the energy an object has due to its height and is calculated as U=mgh. Greater mass, gravitational field strength, or height results in more potential energy. Potential energy also has units of joules. The principle of conservation of energy states that energy cannot be created or destroyed, only changed in form, so the total energy before any transformation must equal the total energy after.
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The roller coaster The Ninja has a height of 122 ft and speed of 52 mph. Its potential energy due to height changes into kinetic energy of motion. Work is done by a force when that force causes an object to move in the direction of the force. The kinetic energy of an object is 1/2mv^2. The potential energy due to gravity is mgh. The work-energy theorem states that the work done on an object is equal to its change in kinetic energy.
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This document defines work, energy, and power. It states that work is the product of force and distance, and the SI unit for work is the joule. It describes different types of energy including chemical, electrical, mechanical, kinetic, and potential energy. Kinetic energy is defined as half mass times velocity squared, while potential energy from gravity is defined as mass times height times gravitational acceleration. The document also covers the law of conservation of energy and defines power as the rate of doing work, with the SI unit being watts.
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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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**More good stuff available at:
www.wsautter.com
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http://www.youtube.com/results?search_query=wnsautter&aq=f
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Work is the product of the applied force and the parallel distance through which the force acts. Energy is the capacity of a physical system to perform work. Power is the rate at which work is done or energy is transformed, measured as work per unit of time. Examples calculate the work done in lifting objects of various masses to different heights or distances, and the power of a lift raising a 500 kg mass 10 m in 5 seconds.
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Work, power and energy are quantitative properties related to the ability to do work or induce heat. Mechanical energy is the sum of potential and kinetic energy and exists in objects due to motion or position. Kinetic energy is the energy of motion and depends on an object's mass and speed, while potential energy is stored energy that depends on an object's height or the elastic forces acting on it. Mechanical energy is transformed between other forms but the total amount remains constant in a closed system without dissipative forces.
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This document defines key concepts related to mechanical work and power, including:
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work energy power for class ix
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.
Work energy power 2 reading assignment -revision 2
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. Power is also defined as the rate of energy transfer or transformation (P=ΔE/Δt or P=W/Δt).
Work energy power 2 reading assignment -revision 2 physics read
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 changes and transformations between kinetic and potential forms. 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) The principle of conservation of energy states that energy cannot be created or destroyed, only converted from one form to another.
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The document discusses the laws of conservation of mechanical energy and work and energy. It provides formulas and an example problem. The key points are:
1) The law of conservation of mechanical energy states that when gravity is the only external force, the total mechanical energy of an object remains constant. The energy is the sum of potential energy and kinetic energy.
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3) An example problem calculates the velocity of a ball immediately before impact after being dropped from a height, by applying the principle that the total mechanical energy remains constant as the potential energy decreases
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Kinetic energy is the energy of motion and is calculated as K = 1/2 mv^2, where m is mass and v is velocity. Doubling speed quadruples kinetic energy, and tripling speed multiplies it by nine. The SI unit for kinetic, potential, and all other types of energy is the Joule. Potential energy depends on mass, gravitational field strength, and height. The total energy before and after an energy transformation will be equal according to the law of conservation of energy. Work is the product of force and displacement and can be positive, negative, or zero depending on the direction of force relative to motion.
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Kinetic energy is the energy of motion and is calculated using the equation K=1/2mv^2. The greater the mass or speed, the more kinetic energy an object has. Kinetic energy has SI units of joules. Gravitational potential energy is the energy an object has due to its height and is calculated as U=mgh. Greater mass, gravitational field strength, or height results in more potential energy. Potential energy also has units of joules. The principle of conservation of energy states that energy cannot be created or destroyed, only changed in form, so the total energy before any transformation must equal the total energy after.
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The roller coaster The Ninja has a height of 122 ft and speed of 52 mph. Its potential energy due to height changes into kinetic energy of motion. Work is done by a force when that force causes an object to move in the direction of the force. The kinetic energy of an object is 1/2mv^2. The potential energy due to gravity is mgh. The work-energy theorem states that the work done on an object is equal to its change in kinetic energy.
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This document defines work, energy, and power. It states that work is the product of force and distance, and the SI unit for work is the joule. It describes different types of energy including chemical, electrical, mechanical, kinetic, and potential energy. Kinetic energy is defined as half mass times velocity squared, while potential energy from gravity is defined as mass times height times gravitational acceleration. The document also covers the law of conservation of energy and defines power as the rate of doing work, with the SI unit being watts.
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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.
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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
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Work, power and energy are quantitative properties related to the ability to do work or induce heat. Mechanical energy is the sum of potential and kinetic energy and exists in objects due to motion or position. Kinetic energy is the energy of motion and depends on an object's mass and speed, while potential energy is stored energy that depends on an object's height or the elastic forces acting on it. Mechanical energy is transformed between other forms but the total amount remains constant in a closed system without dissipative forces.
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The document discusses key physics concepts related to motion, forces, energy, and electricity. It defines terms like speed, velocity, acceleration, force, work, power, kinetic energy, potential energy, current, voltage, and resistance. Formulas are provided for calculating these values along with example problems and explanations of physics principles.
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work energy power for class ix
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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Mechanical energy for 9th grade physics, chapter 6
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Work energy power 2 reading assignment -revision 2
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. Power is also defined as the rate of energy transfer or transformation (P=ΔE/Δt or P=W/Δt).
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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 changes and transformations between kinetic and potential forms. 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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Conservation of energy
The document provides notes from a physics class that covered topics including friction, conservation of energy, and kinetic and potential energy. Students calculated coefficients of friction, solved problems involving sliding friction, and performed an experiment launching pennies into the air using a ruler. The class discussed forms of energy, energy transformations, and formulas for gravitational potential energy, kinetic energy, and elastic potential energy. Sample problems were worked through applying these concepts and units.
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,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.
Power Point Presentation ''Work Power 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.
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.
Conservation of Energy
Okay, let me break this down step-by-step:
* Spring constant (k) = 280 N/m
* Mass (m) = 0.0025 kg
* Deflection (x) = 0.03 m
* EPE = 0.5kx2 = 0.5 * 280 N/m * (0.03 m)2 = 0.81 J
* EPE converts to KE on release: KE = 0.81 J = 0.5mv2
* Solve for v: v = √(2 * 0.81 J / 0.0025 kg) = 4 m/s
* Use v to find maximum height using: h = v2/2g = (
Conservation of energy for web
Okay, let me break this down step-by-step:
* Spring constant (k) = 280 N/m
* Mass (m) = 0.0025 kg
* Deflection (x) = 0.03 m
* EPE = 0.5kx2 = 0.5 * 280 N/m * (0.03 m)2 = 0.81 J
* EPE converts to KE on release: KE = 0.81 J = 0.5mv2
* Solve for v: v = √(2 * 0.81 J / 0.0025 kg) = 4 m/s
* Use v to find maximum height using: h = v2/2g = (
Energy
The document discusses the concepts of mass, weight, potential energy, kinetic energy, and their relationships. It provides examples of calculating potential energy using the formula PE=mgh, kinetic energy using the formula KE=1/2mv^2, and shows that the total mechanical energy of a system remains constant. It then works through an example of calculating the maximum speed of a person on a slingshot pendulum.
Work and energy part a
The document discusses work, energy, and the work-energy principle as an alternative way to analyze motion compared to using forces and Newton's laws. It defines key terms like work, kinetic energy, and systems. The work-energy principle states that the net work done on an object equals its change in kinetic energy (Wnet = ΔKE). This allows reexpressing Newton's second law in terms of energy rather than forces. Examples show how to calculate work, kinetic energy, and use the work-energy principle to solve motion problems.
Chapter 5 notes
This document outlines objectives and concepts related to work, power, and energy. It defines work as the product of force and displacement when they are in the same direction. It introduces kinetic energy and potential energy, and discusses how the conservation of mechanical energy applies to situations where energy is transferred between kinetic and potential forms. Power is defined as the rate at which work is done. Examples are provided to demonstrate calculations of work, kinetic energy, potential energy, and power.
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Work energy power 2 reading assignment -revision 1
- 2. In physics we say work is done when a force acts on something and makes it move. No motion, no work. Simple as that.
- 3. The amount of work done by a force on an object depends on 1. How big that force is, and 2. How far the force moves the object. In physics, we combine two unlike quantities by making a product. The work done W by a force F when the distance moved in the direction of the force is s is defined as W = F . ∆x
- 4. Determine the equation to find the work done on the following object : A) B) C) D) Question 1
- 5. Basic Energy Model SystemEnvironment Energy Transfer by using force (pulling/expanding) Energy Transfer by using force (pushing/Compressing) work is done ON the system SystemEnvironment work is done BY the system
- 6. We can calculate the amount of energy removed/added to the system by using: So… How to determine the amount of Energy removed/ Added to the system? W = F . ∆x Remember : The force should be in line with the displacement . So, we may need cosine or sine to find the component first, before we can calculate the amount of energy removed/added)
- 7. Mechanical Energy • Mechanical Energy is energy that is possessed by an object due to its motion or its position. Types of Mechanical Energy: Kinetic Energy Potential Energy
- 8. Kinetic Energy ‘Kinetic energy of an object is the energy it possesses by virtue of its motion.’ An object has kinetic energy because it has motion. If an object of mass m has a speed v then it must have been accelerated from rest to that speed by some agent, doing work on KE = (½ )mv2 The Kinetic Energy is defined as :
- 9. Question 2
- 10. Question 3 • A 5.00 g bullet moving at 600 m/s penetrates a tree trunk to a depth of4.00 cm. (a) Use the work-energy theorem, to determine the average frictional force that stops the bullet. (b) Assuming that the frictional force is constant, determine how much time elapses between the moment the bullet enters the tree and the moment it stops moving?
- 11. GPE = 0 h m GPE = mgh Potential Energy what is Gravitational Potential Energy? We define GPE of an object in a the body-Earth as the energy it has by virtue of its position relative to the earth. The chart illustrate that the GPE of the object – earth system is defined as : G(PE) =mgh F mg
- 12. Let’s Brainstorm…. • We Already know that : • Now imagine, Suppose you throw a ball upward : 1. What does work while it is flying through the air? GRAVITY 2. Is the CHANGE in kinetic energy POSITIVE or NEGATIVE? NEGATIVE 3. Is the CHANGE in potential energy POSITIVE or NEGATIVE? POSITIVE Thus, we can conclude that : ENERGY IS CONSERVED -∆KE = ∆PE - (KE-KEo) = PE- PEo - KE + KEo = PE- PEo PEo + KEo = PE +KE Energy Before = Energy After
- 13. The law of conservation of mechanical energy states: Energy Cannot Be Created Or Destroyed, Only Transformed AND TRANSFERED! KEo KE PEo PE
- 14. PE KE PE +KE
- 15. Now, Let’s investigate how does the energy transform Challenge yourself : try to fill in the blank before you move to the other slide
- 16. PE KE
- 17. KE PE PE
- 18. continue • The Energy Bar Chart below ilustrates how the transformation energy occur in the previous cases Position 1 Position 2 Position 3 KE KE KEPE PE PE
- 19. Question 4 • Use the figure in slide 10 as your reference. if the mass of the boy is 56 kg and the initial velocity of the skateboard is 5 m/s. calculate the energy transformation (KE,PE,and TME) in each position. Ilustrate the transformation in Energy Bar chart
- 20. Power Power is the amount of transfer/ transformation of energy in certain time taken to realise the transformation. Thus, the amount of Power can be defined as: P = ∆E System/ ∆ t. In the special case that there is no heat involved (i.e. no transfer of energy by using differences of temperature), this reduces to: P = W/ ∆ t