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Center of Mass - A uniform gravitational field, is a concept in physics that describes the average position of the mass of an object. It is a point where the entire mass of an object can be considered to be concentrated for the purposes of analyzing its motion and behavior under the influence of external forces, such as gravity.
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- Free Fall - The motion of an object that is only under the influence of gravity, with no other forces acting on it. In a vacuum or in a situation where air resistance is negligible, all objects near the surface of the Earth will experience the same acceleration due to gravity, regardless of their mass. This acceleration is approximately 9.8 meters per second squared.
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Planck Constant - A physical constant that relates the energy of one photon of electromagnetic waves to the frequency of that wave used in classic mechanics and quantum mechanics. Planck units are based on physical constants rather than human scales. The significance of the Planck constant arises in the context of Planck's law, which describes the spectral distribution of electromagnetic radiation emitted by a black body.
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- Relativistic Energy - A concept in physics that accounts for the effects of special relativity on the energy of an object, especially when it is moving at a significant fraction of the speed of light.
- Relativistic Momentum - A concept in physics that takes into account the effects of special relativity when describing the motion of objects at speeds comparable to the speed of light. In classical mechanics, momentum is defined as the product of an object's mass and its velocity. However, when an object is moving at speeds that are a significant fraction of the speed of light, classical mechanics breaks down, and special relativity becomes necessary.
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