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August 2021) (Learn how and when to remove this message) This is a list of common physical constants and variables, and their notations. Note that bold text indicates that the quantity is a vector .
Every object perseveres in its state of rest, or of uniform motion in a right line, except insofar as it is compelled to change that state by forces impressed thereon. [ note 3 ] Newton's first law expresses the principle of inertia : the natural behavior of a body is to move in a straight line at constant speed.
astrophysics, the physics in the universe, including the properties and interactions of celestial bodies in astronomy; atmospheric physics is the application of physics to the study of the atmosphere; space physics is the study of plasmas as they occur naturally in the Earth's upper atmosphere (aeronomy) and within the Solar System
Degrees of freedom problem – Multiple ways for multi-joint objects to realize a movement; Euler angles – Description of the orientation of a rigid body; Geometric terms of location – Directions or positions relative to the shape and position of an object; Ship motions – Terms connected to the six degrees of freedom of motion
For an object in uniform circular motion, the net force acting on the object equals: [46] = ^, where is the mass of the object, is the velocity of the object and is the distance to the center of the circular path and ^ is the unit vector pointing in the radial direction outwards from the center. This means that the net force felt by the object ...
[21] [22] This is believed to be a unique example in physics of where such a fundamental law is invoked to explain two such different phenomena. [ 23 ] Albert Einstein noticed that the two situations both corresponded to a relative movement between a conductor and a magnet, and the outcome was unaffected by which one was moving.
The ancient Greek understanding of physics was limited to the statics of simple machines (the balance of forces), and did not include dynamics or the concept of work. During the Renaissance the dynamics of the Mechanical Powers, as the simple machines were called, began to be studied from the standpoint of how far they could lift a load, in addition to the force they could apply, leading ...
[6] [7] [8] Homeokinetics – the physics of complex, self-organizing systems; Continuum mechanics – the branch of mechanics that deals with the analysis of the kinematics and the mechanical behavior of materials modeled as a continuous mass rather than as discrete particles. Dynamics – the study of the causes of motion and changes in motion
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