The nature of_energy
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Energy is the ability to do work or cause change. It comes in two forms: kinetic energy, which is energy in motion, and potential energy, which is stored energy. Kinetic energy increases as an object's mass and velocity increase, and can be calculated using the formula kinetic energy = 1/2 x mass x velocity squared. Potential energy is energy that is held and ready to do work, such as the energy stored in compressed springs or lifted objects, where gravitational potential energy can be calculated as weight x height.
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The document discusses different forms of energy and the relationships between them. It states that energy cannot be created or destroyed, only converted from one form to another. Potential energy is stored energy that can be converted to kinetic energy. Gravitational potential energy is equal to mass times gravity times height. Kinetic energy is the energy of motion and is equal to half mass times velocity squared. Work is done when energy is transferred between objects or converted between forms, and work equals force times distance.
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Kinetic energy is the energy of motion that an object possesses due to its mass and velocity. It can be transferred between objects through momentum or forces. The law of conservation of energy states that energy cannot be created or destroyed, only transferred or changed from one form to another, such as potential energy transforming to kinetic energy. Kinetic energy is calculated as one-half the mass times the velocity squared (KE=1/2mv^2), while potential energy depends on the mass and height of an object above the ground or another reference point and is calculated as mass times the force of gravity times height (PE=mgh).
Sci8-Q1-1.5-Kinetic-and-Potential-Energy.pdf
Kinetic energy is the energy of an object due to its motion. It is proportional to the mass of the object and the square of its speed. Potential energy is stored energy due to an object's position or state. Gravitational potential energy depends on an object's mass and its height above a reference point and is calculated using the equation PE=mgh. Examples of kinetic energy include moving cars and flying balls, while examples of potential energy include stacked books and objects at high elevations.
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.
KE Energy and PE Energy Powerpoint no equations manipulated.pptx
Potential energy is stored energy due to an object's position or shape, while kinetic energy is energy of motion. There are two types of potential energy: gravitational potential energy, which depends on mass and height, and elastic potential energy, which depends on changing an object's shape. Kinetic energy depends on an object's mass and velocity and represents the energy of motion. Potential energy is converted to kinetic energy when an object begins moving, such as when a stretched rubber band or raised object is released, transferring energy from a stored to moving state.
KE Energy and PE Energy Powerpoint no equations manipulated.pptx
Potential energy is stored energy due to an object's position or shape, while kinetic energy is energy of motion. There are two types of potential energy: gravitational potential energy, which depends on an object's mass and height, and elastic potential energy, which depends on the stretching or compressing of an object. Kinetic energy depends on an object's mass and velocity and represents the energy of motion. Potential energy is converted to kinetic energy when a stored energy begins to move or change form.
E1 intro-to-energy
The document discusses different types of energy including potential energy, kinetic energy, and electrical energy. It defines energy as the ability to do work and explains that potential energy is stored energy due to an object's position, shape, or condition, while kinetic energy is the energy of motion. The document provides examples of different forms of potential energy like elastic, chemical, and gravitational potential energy and examples of kinetic energy like thermal, mechanical, and electrical energy. It also discusses the laws of conservation of energy and how energy is transferred through different processes like conduction and convection.
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.
W2 Work, Energy and Power PPT .pptx
This document defines work, energy, and power. It states that work is done when a force causes an object to move, and provides the formula for calculating work (W=F×d). Energy is defined as the ability to do work or cause change, and can exist in various forms including potential and kinetic energy. Potential energy is stored energy due to an object's position or property, while kinetic energy is energy due to an object's motion. Power is the rate at which work is done and is calculated as work divided by time (P=W/t). Examples are provided to demonstrate calculating work, energy, and power.
Energy
This document discusses different types of energy. It defines kinetic energy as the energy of movement and potential energy as stored energy. It identifies two types of potential energy: gravitational potential energy, which depends on an object's mass and height, and elastic potential energy, which is the energy stored when an object is stretched or compressed. The document also identifies six main forms of energy: mechanical, thermal, electrical, chemical, nuclear, and electromagnetic energy.
Similar to The nature of_energy (20)
KE Energy and PE Energy Powerpoint no equations manipulated.pptx
KE Energy and PE Energy Powerpoint no equations manipulated.pptx
KE Energy and PE Energy Powerpoint no equations manipulated.pptx
KE Energy and PE Energy Powerpoint no equations manipulated.pptx
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The nature of_energy
- 1. The Nature of Energy
- 2. What is Energy? Energy – the ability to do work or cause change. when an object does work on another object, some of the energy is transferred to that object. Energy is measured in Joules Joule – a unit of measure equal to one newton-meter
- 3. What is work? Work – force exerted on an object that causes it to move Example: pushing a shopping cart
- 4. Two Types of Energy Kinetic Energy – energy in motion Potential Energy – stored energy
- 5. Kinetic Energy The more work you do on an object, the more energy you give the object. The greater the mass of a moving object, the more kinetic energy it has. (Ex. a bowling ball has more kinetic energy than a golf ball traveling at the same velocity) Kinetic energy increases as velocity increases.
- 6. Calculating Kinetic Energy Kinetic Energy = Mass x Velocity2 2 Ex. – What is the kinetic energy of a 10kg wagon moving at 5 m/s? kinetic energy = 10 x 52 = 10 x 25 = 250 2 2 2 kinetic energy = 125 Joules
- 7. Potential Energy Energy that is held in readiness and therefore has potential to do work. Ex. A spring compressed in a wind-up toy Elastic potential energy – energy stored in a stretched or compressed object (rubber band)
- 8. Potential Energy Gravitational potential energy (GPE)– potential energy that depends on height; an object lifted. Gravitational potential energy = weight x height Ex. What is the GPE of a rock that weighs 600 newtons positioned 20 meters of the ground? GPE = 600 x 20 GPE = 12,000 Joules