Energy & Energy Transformations

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What is energy?

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Energy is the ability to do work or cause change. It exists in various forms, including kinetic, potential, thermal, and chemical energy.

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What is kinetic energy?

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Kinetic energy is the energy of an object in motion. It depends on the mass of the object and the speed at which it is moving.

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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. For example, an object at a height has gravitational potential energy.

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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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How is potential energy calculated?

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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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What is the law of conservation of energy?

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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 friction?

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Friction is a force that resists the sliding of two objects that are touching. It acts in the opposite direction of motion.

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What is gravitational potential energy?

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Gravitational potential energy is the potential energy an object has due to its height above the ground, calculated as PE = mgh.

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What happens to energy during a roller coaster ride?

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As a roller coaster moves, potential energy is converted to kinetic energy and vice versa, demonstrating energy transformation.

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What is the relationship between mass and kinetic energy?

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Kinetic energy increases with mass; if the mass of an object doubles, its kinetic energy also doubles if speed remains constant.