Review Law of Conservation of Energy

Front

What is the Law of Conservation of Energy?

Back

The Law of Conservation of Energy states that energy cannot be created or destroyed, only transformed from one form to another.

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What is kinetic energy?

Back

Kinetic energy is the energy of an object in motion. It is the energy that an object possesses due to its movement.

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What is potential energy?

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Potential energy is the stored energy of an object due to its position or state. It has the potential to do work in the future.

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How does energy transform in a hydroelectric dam?

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In a hydroelectric dam, gravitational potential energy of water is transformed into kinetic energy as it flows down, which is then converted into electrical energy.

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What is an example of kinetic energy?

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A moving car is an example of kinetic energy because it is in motion and can do work.

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What is an example of potential energy?

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A rock at the top of a hill has potential energy because of its position; it can fall and do work.

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What happens to energy during a collision?

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During a collision, kinetic energy can be transformed into other forms of energy, such as thermal energy, but the total energy remains constant.

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What is thermal energy?

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Thermal energy is the energy that comes from the temperature of matter. It is the total kinetic energy of the particles in an object.

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What is nuclear energy?

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Nuclear energy is the energy stored in the nucleus of an atom. It can be released during nuclear reactions, such as fission or fusion.

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Can energy disappear?

Back

No, energy cannot disappear; it can only change forms. For example, kinetic energy can transform into thermal energy.