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  2. List of equations in classical mechanics - Wikipedia

    en.wikipedia.org/wiki/List_of_equations_in...

    Classical mechanics is the branch of physics used to describe the motion of macroscopic objects. [1] It is the most familiar of the theories of physics. The concepts it covers, such as mass, acceleration, and force, are commonly used and known. [2] The subject is based upon a three-dimensional Euclidean space with fixed axes, called a frame of ...

  3. Classical central-force problem - Wikipedia

    en.wikipedia.org/wiki/Classical_central-force...

    In classical mechanics, the central-force problem is to determine the motion of a particle in a single central potential field.A central force is a force (possibly negative) that points from the particle directly towards a fixed point in space, the center, and whose magnitude only depends on the distance of the object to the center.

  4. National Assessment of Educational Progress - Wikipedia

    en.wikipedia.org/wiki/National_Assessment_of...

    Over the years, NCES has conducted a number of other studies related to different aspects of the NAEP program. A few studies from the recent past are listed below: The Oral Reading Study was undertaken to discover how well the nation's fourth-graders can read aloud a typical grade 4 story. The assessment provided information about students ...

  5. Roc Books - Wikipedia

    en.wikipedia.org/wiki/Roc_Books

    Roc Books is a fantasy imprint of Penguin Group, as part of its New American Library.It was launched in April 1990 after Penguin Chairman Peter Mayer asked John Silbersack, the editor in chief of New American Library's science fiction (SF) program, to launch a new imprint that would draw more attention to Penguin's SF presence.

  6. Rigid body dynamics - Wikipedia

    en.wikipedia.org/wiki/Rigid_body_dynamics

    In the physical science of dynamics, rigid-body dynamics studies the movement of systems of interconnected bodies under the action of external forces.The assumption that the bodies are rigid (i.e. they do not deform under the action of applied forces) simplifies analysis, by reducing the parameters that describe the configuration of the system to the translation and rotation of reference ...

  7. Screw theory - Wikipedia

    en.wikipedia.org/wiki/Screw_theory

    The force and torque vectors that arise in applying Newton's laws to a rigid body can be assembled into a screw called a wrench. A force has a point of application and a line of action, therefore it defines the Plücker coordinates of a line in space and has zero pitch. A torque, on the other hand, is a pure moment that is not bound to a line ...

  8. Theory of impetus - Wikipedia

    en.wikipedia.org/wiki/Theory_of_impetus

    After impetus was introduced by John Philoponus in the 6th century, [2] [3] and elaborated by Nur ad-Din al-Bitruji at the end of the 12th century. [4] The theory was modified by Avicenna in the 11th century and Abu'l-Barakāt al-Baghdādī in the 12th century, before it was later established in Western scientific thought by Jean Buridan in the ...

  9. Although a common classroom experiment is often explained this way, [441] Bernoulli's principle only applies within a flow field, and the air above and below the paper is in different flow fields. [442] The paper rises because the air follows the curve of the paper and a curved streamline will develop pressure differences perpendicular to the ...

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