work power and energy.pptx
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1. Work is defined as the product of the net force acting on a body and the distance moved in the direction of the force. Only the component of the applied force in the direction of motion does work. 2. Power is the rate at which work is done and is measured in watts. Kinetic energy is the energy of motion while potential energy is stored energy due to an object's position or compression. 3. The principle of conservation of energy states that the total energy in a system remains constant, though it may be transferred between kinetic and potential forms.
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WORK POWER AND ENERGY
1) Work is defined as the product of the net force acting on a body and the distance moved in the direction of the force. The SI unit for work is the joule.
2) Power is defined as the rate at which work is done. It is measured in watts, which are equal to one joule per second.
3) There are two main types of energy: kinetic energy, which is the energy of motion, and potential energy, which is stored energy due to an object's position or composition. The SI unit for both is the joule. According to the law of conservation of energy, the total energy in an isolated system remains constant.
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This document defines and provides examples of work, energy, and power. It begins by defining work as the product of force and parallel distance moved. Only the horizontal component of force does work. Examples calculate work done by lifting objects and walking. Power is defined as the rate of doing work and examples calculate power for moving objects over time. Kinetic energy is energy of motion while potential energy is stored energy. The conservation of energy is explained - the total energy in an isolated system remains constant as it transforms between kinetic and potential forms. Practice problems demonstrate calculating kinetic, potential, and transformed energy.
WORK ENERGY POWER 8.pptx
1. Work is defined as the product of the net force acting on a body and the distance moved in the direction of the force. The SI unit for work is joules.
2. Power is the rate at which work is done. The SI unit for power is watts, which is equal to 1 joule per second.
3. Energy exists in two forms: kinetic energy, which is the energy of motion, and potential energy, which is stored energy. The SI unit for energy is joules.
WORK ENERGY POWER 8.pptx
1. Work is defined as the product of the net force acting on a body and the distance moved in the direction of the force. The SI unit for work is joules.
2. Power is the rate at which work is done. The SI unit for power is watts, which is equal to 1 joule per second.
3. Energy exists in two forms: kinetic energy (energy of motion) and potential energy (stored energy). The SI unit for both is joules. Kinetic energy depends on an object's mass and speed, while potential energy depends on an object's mass and position.
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This document discusses the concepts of work, potential energy, and kinetic energy. It provides examples of calculating work using the formula W=Fd, where W is work, F is force, and d is distance. Potential energy is defined as energy due to an object's position and is calculated as PE=mgh, where m is mass, g is gravitational acceleration, and h is height. Kinetic energy is the energy of a moving object and depends on an object's mass and velocity. The document also discusses how power relates to work and time, with greater power requiring more work done in less time.
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1. The document discusses work, energy, and their relationship. It defines work as being done when a force causes an object to move in the direction of the force, displacing it.
2. Potential energy is defined as the energy an object gains when lifted against the force of gravity. It depends on the object's mass and height and is calculated as PE=mgh.
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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
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1) Work is defined as the product of the net force acting on a body and the distance moved in the direction of the force. The SI unit for work is the joule.
2) Power is defined as the rate at which work is done. It is measured in watts, which are equal to one joule per second.
3) There are two main types of energy: kinetic energy, which is the energy of motion, and potential energy, which is stored energy due to an object's position or composition. The SI unit for both is the joule. According to the law of conservation of energy, the total energy in an isolated system remains constant.
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This document defines and provides examples of work, energy, and power. It begins by defining work as the product of force and parallel distance moved. Only the horizontal component of force does work. Examples calculate work done by lifting objects and walking. Power is defined as the rate of doing work and examples calculate power for moving objects over time. Kinetic energy is energy of motion while potential energy is stored energy. The conservation of energy is explained - the total energy in an isolated system remains constant as it transforms between kinetic and potential forms. Practice problems demonstrate calculating kinetic, potential, and transformed energy.
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1. Work is defined as the product of the net force acting on a body and the distance moved in the direction of the force. The SI unit for work is joules.
2. Power is the rate at which work is done. The SI unit for power is watts, which is equal to 1 joule per second.
3. Energy exists in two forms: kinetic energy, which is the energy of motion, and potential energy, which is stored energy. The SI unit for energy is joules.
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1. Work is defined as the product of the net force acting on a body and the distance moved in the direction of the force. The SI unit for work is joules.
2. Power is the rate at which work is done. The SI unit for power is watts, which is equal to 1 joule per second.
3. Energy exists in two forms: kinetic energy (energy of motion) and potential energy (stored energy). The SI unit for both is joules. Kinetic energy depends on an object's mass and speed, while potential energy depends on an object's mass and position.
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This document discusses the concepts of work, potential energy, and kinetic energy. It provides examples of calculating work using the formula W=Fd, where W is work, F is force, and d is distance. Potential energy is defined as energy due to an object's position and is calculated as PE=mgh, where m is mass, g is gravitational acceleration, and h is height. Kinetic energy is the energy of a moving object and depends on an object's mass and velocity. The document also discusses how power relates to work and time, with greater power requiring more work done in less time.
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1. The document discusses work, energy, and their relationship. It defines work as being done when a force causes an object to move in the direction of the force, displacing it.
2. Potential energy is defined as the energy an object gains when lifted against the force of gravity. It depends on the object's mass and height and is calculated as PE=mgh.
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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.
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Work.pptx
1. Work is done when a force causes an object to move in the direction of the force. Work is the product of the force applied and the displacement of the object.
2. Kinetic energy is the energy of motion that an object has due to its mass and velocity. Potential energy is stored energy due to an object's position or state, such as gravitational potential energy from height.
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1) Work is done when a constant force causes an object to move in the direction of the applied force. Work equals force multiplied by displacement.
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- 1. WORK, ENERGY & POWER Jeszianlenn L. Plaza January 14, 2015
- 2. Whoโs doing more work? A B
- 3. WORK Work is defined as the product of the net force acting on a body and the distance moved in the direction of the force Work = force x parallel distance W = F x d SI unit: J - joules (1 joules = 1Nm = 1kgm2/s2)
- 4. Whoโs doing more work? A B
- 5. WORK Only the component of the applied force, F, in the direction of the motion of the lawn mower, FHorizontal, is used to do work on the lawn mower
- 6. Practice! 1. An object is moved with a force of 15 N across a horizontal surface. How much work is done if the object is moved 50 m? 2. 650 J of work is done in moving a desk a horizontal distance of 5 m. How much force is used to move the desk? 3. How much work is done in lifting a 10 kg box 1.5 m off the floor?
- 7. Practice! How much work is done in lifting a 10 kg box 1.5 m off the floor? F=ma : w=mg w=(10 kg)(9.8 m/s2 ) = ? W=Fd W = (100 N)(1.5 m) = ?
- 8. Practice! How much work is done while walking 5.0 m holding an object with mass of 3.0 kg?
- 9. Practice!
- 10. POWER Power is the rate at which work is done SI unit: watts (1 watt=1 joule/s)
- 11. Practice! 1. A force of 150 N is used to push a motorcycle 10 m along a road in 20 s. Calculate the power in watts. 2. An 80 kg man runs up a flight of stairs 5.0 m high in 10 seconds. What is the manโs power output in watts? 3. A pump lifts 30 kg of water a vertical distance of 20 m each second. What is the power output?
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- 13. ENERGY โข Energy is defined as the ability to do work
- 14. ENERGY โข Two types of energy: kinetic (motion) and potential (stored) โข SI unit of energy are joules (1 joule=1kgm2/s2)
- 15. Kinetic Energy โข KE is energy of motion โข KE is a scalar quantity
- 16. Practice! 1. What is the kinetic energy of a 60 kg girl on skis traveling at 20 m/s? 2. A sports car is moving at 4.0 m/s. If the mass of the car is 800 kg, how much kinetic energy does it have?
- 17. Potential Energy โข PE is stored energy The compressed spring has potential energy because when released it can do work on the mass, m โข Gravitational PE is energy of position
- 18. Potential Energy โข Gravitational PE is energy of position
- 19. Practice! 1. A mass of 100 kg is lifted a distance of 50 m. How much potential energy does it possess? 2. A 70kg diver standing on a diving platform possesses 35000 J of PE. How high is the platform?
- 20. Conservation of Energy โข The sum of kinetic energy and potential energy in a system is constant, in absence of friction. โข Energy cannot be created or destroyedอพ it may be transformed from one form to another, but the total amount of energy in a system remains constant.
- 22. Practice! 1. A 10kg boulder rests at the edge of a 100m cliff. a. How much potential energy does the rock possess b. The rock rolls off the cliff and falls to the bottom. How much kinetic energy does the rock possess at the bottom of the cliff?