Work And EnerGy..
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Work is done when a force causes an object to displace. There are three types of work: positive work occurs when force and displacement are in the same direction, negative work when they are opposite, and zero work when no displacement happens. Energy is the ability to do work and comes in kinetic and potential forms. Kinetic energy is the energy from motion and equals 1/2mv^2, while potential energy depends on position and equals mgh.
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Physics: work, force and energy
The document discusses the concepts of force, energy, and work in physics including defining force as a push or pull, balanced and unbalanced forces, kinetic and potential energy, the conditions for work to be done as the product of force and displacement along the direction of force, and providing examples to illustrate these concepts.
Lecture17 energy
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.
work and energy
This document discusses different types of energy including kinetic energy, potential energy, and mechanical energy. It defines work as the product of force and displacement, and explains that work can be positive, negative, or zero depending on the direction of force and displacement. The document also covers the law of conservation of energy, stating that the total energy in a system remains constant despite transformations between different types of energy. Finally, it defines power as the rate at which work is done or energy is transferred, with units of watts.
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.
Types of Energy
There are two main types of energy: kinetic energy, which is energy due to motion, and potential energy, which is stored energy that an object has due to its position or state. Potential energy comes in several forms including gravitational, elastic, electric, and chemical. Kinetic energy of an object is calculated as one-half the mass times the velocity squared, while gravitational potential energy is calculated as mass times gravity times height. Examples are given of translational kinetic energy from linear motion and rotational kinetic energy from angular motion.
workenergypowerbyakshat-151106163627-lva1-app6892.pdf
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2) Kinetic energy is the energy an object possesses due to its motion, and depends on the object's mass and velocity.
3) Potential energy is energy stored within a system due to an object's position or shape, such as energy stored when stretching a spring.
Force and Motion PPT.pptx
Force is defined as a push or pull acting on an object due to interaction with another object. It is measured in Newtons and can be contact forces or non-contact forces. Net force is the combination of all forces acting on an object and is calculated by adding forces in the same direction and subtracting opposing forces. Motion is defined as a change in position over time and includes translational, rotational, and oscillatory types. The three laws of motion are: 1) Law of Inertia - an object at rest stays at rest or an object in motion stays in motion unless acted on by an unbalanced force. 2) Law of Acceleration - force equals mass times acceleration. Greater force is needed to accelerate greater mass
force and motion.pdf
This document provides an overview of forces and motion. It defines key terms like force, motion, velocity, and acceleration. It explains that a force is a push or pull and can cause an object to start or stop moving, or change direction. Forces can be contact forces, like normal force and friction, or non-contact forces, like gravity and magnetism. An object will accelerate if the net force acting on it is non-zero. Free-body diagrams are used to represent the different forces acting on an object.
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Work and energy g7
Work is done when a force causes an object to move in the direction of the applied force. For work to occur, a force must be applied to an object and the object must move in the direction of the force. Potential energy is the energy of an object due to its position, and kinetic energy is the energy of an object due to its motion. Mechanical energy is the total potential and kinetic energy in a system.
Work
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.
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9th Work & Energy.ppt
The document defines key physics concepts related to work, energy, and power:
1) Work is the product of the force applied and the distance an object is displaced in the direction of the force. Work is measured in joules and can be positive, negative, or zero depending on the angle between the force and displacement.
2) Kinetic energy is the energy of an object due to its motion, calculated as one-half mass times velocity squared. Potential energy is stored energy due to an object's position in a force field, calculated as mass times gravitational field strength times height.
3) Power is defined as the rate at which work is done and is measured in watts, with one watt
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.
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This document discusses different forms of energy. It defines work, power, and energy and explains the relationship between them. It describes two main types of energy - kinetic energy, which is the energy of motion, and potential energy, which is stored energy. Potential energy includes gravitational potential energy due to an object's position and height, and elastic potential energy stored in stretched or compressed objects. Other forms of energy discussed include mechanical, thermal, electrical, chemical, nuclear, and electromagnetic energy.
Newtons_Laws.ppt
Newton's three laws of motion are summarized as follows:
1. An object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.
2. The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object.
3. For every action, there is an equal and opposite reaction.
Force motion-magnetism
The document discusses physics concepts related to forces and motion. Part 1 covers forces, including defining a force, balanced and unbalanced forces, and Newton's laws of motion. Part 2 discusses motion concepts such as position, speed, velocity, and how to calculate speed. Key ideas are that forces cause motion or changes in motion, and that balanced forces result in no net force while unbalanced forces do result in a net force and acceleration.
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This document discusses Newton's laws of motion. It begins by defining dynamics as the relationship between motion and the forces that cause it. It then explains that Newton's laws of motion are the fundamental principles of classical mechanics. The document goes on to define key concepts such as force, mass, and inertia. It proceeds to explain each of Newton's three laws of motion - the law of inertia, the second law relating force and acceleration, and the third law of action and reaction. Several examples are provided to illustrate the laws. The document concludes by presenting five assignment problems applying Newton's laws.
Newtons_Laws.ppt
Newton's three laws of motion are summarized as follows:
1) An object at rest stays at rest and an object in motion stays in motion unless acted upon by an unbalanced force.
2) The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object.
3) For every action, there is an equal and opposite reaction.
Newtons_Laws.ppt
Newton's three laws of motion are summarized as follows:
1) Newton's First Law states that objects at rest will stay at rest and objects in motion will stay in motion with the same speed and in the same direction unless acted upon by an unbalanced force.
2) Newton's Second Law establishes the relationship between an object's mass, its acceleration, and the applied force as F=ma.
3) Newton's Third Law describes that for every action force there is an equal and opposite reaction force.
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Work And EnerGy..
- 3. Work: When a force is applied on a object which results in displacement then work is said to be done.
- 4. There are three types of Work they are 1) Positive Work 2) Negative Work 3) Zero Work
- 5. Positive work is said to be done if the force applied & the displacement of the object is in same direction.
- 6. Negative work is said to be done if the force applied & the displacement occurred are in opposite direction.
- 7. Zero work is said to be done if force is applied and the displacement doesn’t occurs.
- 8. Energy Energy is nothing but the ability to do work.
- 9. There are few types of energy, they are 1) Kinetic Energy 2) Potential Energy
- 10. Kinetic Energy: The energy possesed by body on virtue of it’s motion is called Kinetic Energy Kinetic Energy = ½mv²
- 11. Potential Energy : The Energy possesed by body on virtue of it’s position is called Potential Energy. Potential Energy = mgh
- 12. Thank You