Mechanical Energy

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What is mechanical energy?

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Mechanical energy is the sum of potential energy and kinetic energy in an object that is used to do work.

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NGSS.MS-PS3-5

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What are the two main types of mechanical energy?

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The two main types of mechanical energy are kinetic energy (energy of motion) and potential energy (stored energy due to position).

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How is kinetic energy calculated?

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Kinetic energy (KE) is calculated using the formula KE = 1/2 mv², where m is mass and v is velocity.

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What is potential energy?

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Potential energy is the energy stored in an object due to its position or configuration.

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NGSS.MS-PS3-2

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How is gravitational potential energy calculated?

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Gravitational potential energy (PE) is calculated using the formula PE = mgh, where m is mass, g is the acceleration due to gravity, and h is height.

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NGSS.MS-PS3-2

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What is the principle of conservation of mechanical energy?

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The principle of conservation of mechanical energy states that in a closed system, the total mechanical energy remains constant if only conservative forces are acting.

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What is an example of kinetic energy in everyday life?

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An example of kinetic energy is a moving car or a thrown ball.

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What is an example of potential energy in everyday life?

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An example of potential energy is water stored in a dam or a drawn bow.

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What factors affect the amount of kinetic energy an object has?

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The amount of kinetic energy an object has depends on its mass and its velocity.

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What happens to mechanical energy when friction is present?

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When friction is present, some mechanical energy is converted into thermal energy, leading to a loss of mechanical energy in the system.

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