Work,energy and power
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This document discusses work, energy, and power. It defines work as the product of the force and displacement of an object. Energy is needed for an object to do work, and exists in five forms: mechanical, heat, chemical, electromagnetic, and nuclear. Mechanical energy includes both kinetic energy, the energy of motion, and potential energy stored in an object's position or spring compression. Power is defined as the rate of doing work, or the amount of work done per unit of time.
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1. Newton's universal law of gravitation states that every object in the universe attracts every other object with a force proportional to the product of their masses and inversely proportional to the square of the distance between them.
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1) Work is defined as a force acting upon an object to cause displacement and is expressed as the product of force and displacement in the direction of force.
2) The work done on a body depends on the magnitude of the force and the displacement through which the body moves in the direction of force.
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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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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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1 work
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Work,energy and power
contain description of work, energy and power in terms of physics. Useful for plus one science classes
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This document defines and provides formulas for work, energy, power, and the law of conservation of energy. It explains that work is the product of force and displacement and its unit is joules. There are two types of energy: kinetic energy, which is the energy of motion, and potential energy, which is energy at rest in gravitational, chemical, or elastic forms. The law of conservation of energy states that energy cannot be created or destroyed, only changed from one form to another. Power is defined as the rate of doing work or speed of work and its unit is watts. Sample problems are provided to demonstrate calculating kinetic energy, gravitational potential energy, work, and power.
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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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Work is defined as applying a force over a distance. Power is a measure of how fast work is done and is measured in watts. There are different types of energy including kinetic, heat, chemical, electromagnetic, nuclear, and potential. Kinetic energy is the energy of motion and depends on an object's mass and speed, with more mass and higher speeds resulting in greater kinetic energy. The work-energy theorem states that the net work done on an object is equal to the change in its kinetic energy.
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Work can be positive or negative depending on the direction of force and displacement. Positive work is done when force and displacement are in the same direction, such as when a weight is lifted, gaining gravitational potential energy. Negative work is done when force and displacement are in opposite directions, as when a weight is lowered and gravitational potential energy is lost. The equation for work, W = Fcosθ x Δd, produces a negative number when the force and displacement are at 180 degrees to each other, indicating negative work has been done.
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Work is defined as a force causing an object to move in the direction of the force. No work is done if there is no movement. More work is required to do a task quickly than slowly. Power is the rate at which work is done and is calculated by dividing the amount of work by the time taken. Work is being done on objects when a force moves them in the direction of the force.
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Work in physics has a clear definition - it is the product of the component of a force along the direction of displacement and the magnitude of the displacement. For a constant force F applied parallel to an object's displacement x on a horizontal surface, the work done is defined as F x. Work is also equal to the force component parallel to displacement (F cos θ) multiplied by the displacement (x). One Joule is the work done by a force of 1 Newton through a displacement of 1 meter.
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contain description of work, energy and power in terms of physics. Useful for plus one science classes
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This document discusses work, energy, and power. It defines work as a force multiplied by distance, and defines energy as the ability to do work. There are two types of mechanical energy: potential energy, which is energy due to an object's position or configuration, and kinetic energy, which is energy due to an object's motion. Potential energy can be gravitational or elastic. Kinetic energy is defined as half an object's mass multiplied by its velocity squared. The work-energy theorem states that work done on an object equals the change in its kinetic energy. The law of conservation of energy says energy cannot be created or destroyed, only changed from one form to another. Power is defined as the rate of doing work, or work
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This document discusses deflection energy and virtual work using the energy method. It defines the work done by a force as the product of the force and displacement in the direction of the force. The total work is the integral of this between the limits of displacement. Similarly, the work of a moment is defined as the product of the moment and the angle of rotation, with the total work being the integral of this between the angular limits.
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Work is defined as applying a force over a distance. Power is a measure of how fast work is done and is measured in watts. There are different types of energy including kinetic, heat, chemical, electromagnetic, nuclear, and potential. Kinetic energy is the energy of motion and depends on an object's mass and speed, with more mass and higher speeds resulting in greater kinetic energy. The work-energy theorem states that the net work done on an object is equal to the change in its kinetic energy.
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1. Potential energy is energy stored in an object due to its position or state. It is considered energy at rest.
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3. Chemical potential energy is energy stored in chemical bonds. The law of conservation of energy states that energy cannot be created or destroyed, only changed from one form to another.
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Work can be positive or negative depending on the direction of force and displacement. Positive work is done when force and displacement are in the same direction, such as when a weight is lifted, gaining gravitational potential energy. Negative work is done when force and displacement are in opposite directions, as when a weight is lowered and gravitational potential energy is lost. The equation for work, W = Fcosθ x Δd, produces a negative number when the force and displacement are at 180 degrees to each other, indicating negative work has been done.
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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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This document discusses momentum and impulse in mechanics. It defines momentum as the product of mass and velocity, and impulse as the product of force and time. Impulse causes changes in momentum according to the equation Ft = Δp. Collisions can be elastic, inelastic, or perfectly inelastic, with elastic collisions conserving both momentum and kinetic energy. Examples are provided to demonstrate calculating momentum, velocity, and kinetic energy before and after collisions.
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Work,energy and power
- 1. WORK, ENERGY AND POWER
- 2. BEING ABLE TO DISTINGUISH BETWEEN ENERGY, WORK AND POWER FORMULATE THE RELATIONSHIP AMONG FORCE, ENRGY, WORK AND POWER INTO EQUATIONS
- 3. WORK IS THE PRODUCT OF THE COMPONENT OF FORCE AND THE MAGNITUDE OF THE DISPLACEMENT FORMULA FOR WORK W = F ∆x F W= work (Joule) ∆X F= force ( Newton) ∆x= displecement (metres)
- 4. ENERGY IS NEEDED BY AN OBJECT TO DO WORK THE FIVE FORMS OF ENERGY ARE: o MECHANICAL ENERGY o HEAT ENERGY o CHEMICAL ENERGY o ELECTROMAGNETIC ENERGY o NUCLEAR ENERGY
- 5. MECHANICAL ENERGY KINETIC ENERGY POTENTIAL ENERGY Gravitational potential energy Spring potential energy Kinetic energy formula: m v Gravitational potential energy EP = mgh Spring potential energy
- 6. POWER is the amount of work done per unit time