Podcast
Questions and Answers
What is energy?
What is energy?
The ability to do work.
What is force?
What is force?
A push or a pull.
What is heat?
What is heat?
The energy of vibrating molecules.
What is kinetic energy?
What is kinetic energy?
What is mechanical energy?
What is mechanical energy?
What is potential energy?
What is potential energy?
What does 'pull' refer to in terms of force?
What does 'pull' refer to in terms of force?
What does 'push' refer to in terms of force?
What does 'push' refer to in terms of force?
What is work in relation to force?
What is work in relation to force?
All forms of energy can be converted into any other form.
All forms of energy can be converted into any other form.
Force is defined as a(n) _____ or a(n) _____ on an object.
Force is defined as a(n) _____ or a(n) _____ on an object.
Which type of force is indicated here: Sitting in a chair?
Which type of force is indicated here: Sitting in a chair?
Which type of force is indicated here: Kicking a football?
Which type of force is indicated here: Kicking a football?
Which type of force is indicated here: Carrying a suitcase?
Which type of force is indicated here: Carrying a suitcase?
Which type of force is indicated here: Working a revolving door?
Which type of force is indicated here: Working a revolving door?
Which type of force is indicated here: Opening a front-loading washing machine?
Which type of force is indicated here: Opening a front-loading washing machine?
Work is defined as a(n) _____ moving a(n) _____ through a distance.
Work is defined as a(n) _____ moving a(n) _____ through a distance.
For work to be accomplished, an object must move in the same _____ as the applied _____.
For work to be accomplished, an object must move in the same _____ as the applied _____.
Is work being done in the example: A mother pushing a child on a swing?
Is work being done in the example: A mother pushing a child on a swing?
Is work being done in the example: A person pulling a rope attached to a wall?
Is work being done in the example: A person pulling a rope attached to a wall?
Is work being done in the example: A baby pulling at his father's 100-pound barbells?
Is work being done in the example: A baby pulling at his father's 100-pound barbells?
Is work being done in the example: A wind pushing a sailboat?
Is work being done in the example: A wind pushing a sailboat?
Is work being done in the example: A secretary typing a letter?
Is work being done in the example: A secretary typing a letter?
Is work being done in the example: A woman pushing on a locked door?
Is work being done in the example: A woman pushing on a locked door?
Is work being done in the example: A leaf falling from a tree?
Is work being done in the example: A leaf falling from a tree?
Energy is the ability to accomplish _____.
Energy is the ability to accomplish _____.
The energy possessed by a moving mass is called _____ energy.
The energy possessed by a moving mass is called _____ energy.
Why must all forms of energy be changed into kinetic energy before work can be accomplished?
Why must all forms of energy be changed into kinetic energy before work can be accomplished?
Kinetic energy can come from other sources of energy.
Kinetic energy can come from other sources of energy.
Work is the measure of the _____ used to move an object.
Work is the measure of the _____ used to move an object.
Flashcards
Energy
Energy
The ability to do work.
Force
Force
A push or a pull.
Heat
Heat
The energy of vibrating molecules.
Kinetic Energy
Kinetic Energy
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Mechanical Energy
Mechanical Energy
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Potential Energy
Potential Energy
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Pull (force)
Pull (force)
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Push (force)
Push (force)
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Work (force)
Work (force)
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Energy Conversion
Energy Conversion
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Work (action)
Work (action)
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Work done (example 1)
Work done (example 1)
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Work done (example 2)
Work done (example 2)
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Work done (example 3)
Work done (example 3)
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Work done (example 4)
Work done (example 4)
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Work done (example 5)
Work done (example 5)
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Work done (example 6)
Work done (example 6)
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Work done (example 7)
Work done (example 7)
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Work in relation to a force
Work in relation to a force
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Study Notes
Energy Concepts
- Energy is the capacity to perform work.
- Kinetic energy refers to energy possessed by a moving object.
- Potential energy is stored energy that can be converted into kinetic energy.
- Mechanical energy is the sum of kinetic and potential energy in a system.
Force Definitions
- Force is a push or pull exerted on an object.
- A push indicates a force directed towards an object, while a pull indicates a force directed away from it.
Work Principles
- Work is defined as the product of force applied to an object and the distance the object moves in the direction of the force.
- For work to be done, movement must occur in alignment with the direction of the applied force.
- No work is accomplished if an object does not move, even under the influence of force.
Work Scenarios
- Work is being done when a mother pushes a child on a swing, a wind pushes a sailboat, a secretary types, or a leaf falls from a tree.
- Work is not being done when a person pulls a rope attached to a wall, a baby pulls at a heavy barbell, a woman pushes against a locked door, or when a large force continuously pushes an object without movement.
Kinetic Energy Characteristics
- Kinetic energy can be derived from different sources of energy.
- All forms of energy must be converted into kinetic energy for work to occur.
- Kinetic energy is influenced by the mass and velocity of a moving object.
General Truths About Energy & Work
- Energy conversion is a fundamental principle; energy can change forms but cannot be created or destroyed.
- Work measures the force applied to an object over a distance.
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