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Questions and Answers
What does the Law of Conservation of Energy state?
What does the Law of Conservation of Energy state?
- Energy can be created.
- Energy can be lost during transformations.
- Energy can be destroyed.
- Energy can only be transformed from one form into another. (correct)
What happens to the potential energy of water behind a dam as it flows over?
What happens to the potential energy of water behind a dam as it flows over?
It changes to kinetic energy.
What is kinetic energy?
What is kinetic energy?
The energy an object has due to its motion.
What is potential energy?
What is potential energy?
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Energy is lost during energy transformations.
Energy is lost during energy transformations.
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Study Notes
The Law of Conservation of Energy
- Energy cannot be created or destroyed, only transformed between forms.
- The total amount of energy in a closed system remains constant.
Mechanical Energy Transformation
- Potential energy is stored energy; it is present in water held behind a dam.
- As water flows over the dam, its potential energy is converted into kinetic energy, which is energy of motion.
Kinetic Energy
- Defined as the energy an object possesses due to its motion.
- The amount of kinetic energy an object has depends on its mass and velocity.
Potential Energy
- Refers to energy stored in an object that is not currently in motion.
- Potential energy can be transformed into kinetic energy when the object begins to move.
Energy Conservation in Transformations
- Energy may convert from one type to another during transformations, such as from potential to kinetic.
- Despite these transformations, the overall energy in a system remains unchanged.
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