Zobrazeno 1 - 10
of 92
pro vyhledávání: '"Lemos, Nivaldo A."'
Autor:
Lemos, Nivaldo A.
The status of the equivalence principle in modified symmetric teleparallel gravity is examined. In this theory, minimum length geodesics are distinct from autoparallel geodesics, that is, the ``shortest'' paths are not the ``straightest'' paths. We s
Externí odkaz:
http://arxiv.org/abs/2412.15805
Autor:
Lemos, Nivaldo A.
Integrable velocity-dependent constraints are said to be semiholonomic. For good reasons, holonomic and semiholonomic constraints are thought to be indistinguishable in Lagrangian mechanics. This well-founded belief notwithstanding, here we show by m
Externí odkaz:
http://arxiv.org/abs/2111.06226
Autor:
Lemos, Nivaldo A.
Vakonomic mechanics has been proposed as a possible description of the dynamics of systems subject to nonholonomic constraints. The aim of the present work is to show that for an important physical system the motion brought about by vakonomic mechani
Externí odkaz:
http://arxiv.org/abs/2105.02113
Autor:
Lemos, Nivaldo A., Moriconi, Marco
Problems involving rolling without slipping or no sideways skidding, to name a few, introduce velocity-dependent constraints that can be efficiently treated by the method of Lagrange multipliers in the Lagrangian formulation of the classical equation
Externí odkaz:
http://arxiv.org/abs/2012.11059
Autor:
Lemos, Nivaldo A.
The variational problem of the least uncomfortable journey between two locations on a straight line is simplified by a choice of the dependent variable. It is shown that taking the position, instead of the velocity, as the optimal function of time to
Externí odkaz:
http://arxiv.org/abs/2008.00800
Autor:
Lemos, Nivaldo A.
Publikováno v:
Eur. J. Phys. 40, 055802 (2019)
The problem of the "least uncomfortable journey" between two locations on a straight line, originally discussed by Anderson {\it et al.} (2016 {\it Am. J. Phys.} {\bf 84} 6905) is revisited. When the integral of the square of the acceleration is used
Externí odkaz:
http://arxiv.org/abs/1910.11087
Autor:
Lemos, Nivaldo A.
Publikováno v:
European Journal of Physics, 38 (2017), 065001
The dynamics of Atwood's machine with a string of significant mass are described by the Lagrangian formalism, providing an eloquent example of how the Lagrangian approach is a great deal simpler and so much more expedient than the Newtonian treatment
Externí odkaz:
http://arxiv.org/abs/1710.01263
Every university introductory physics course considers the problem of Atwood's machine taking into account the mass of the pulley. In the usual treatment the tensions at the two ends of the string are offhandedly taken to act on the pulley and be res
Externí odkaz:
http://arxiv.org/abs/1706.10139