234 citations · 883 across the 41 of their papers we have counts for
41 papers
Relativistic mechanical-thermodynamical formalism -- description of inelastic collisions
Julio Guemez, Manuel Fiolhais, Luis A. Fernandez
We present a relativistic formalism inspired on the Minkowski four-vectors that also includes conservation laws such as the first law of thermodynamics. It remains close to the rel…
"Walking" Along a Free Rotating Bicycle Wheel (Round and Round)
Julio Guemez, Manuel Fiolhais
We describe the kinematics, dynamics and also some energetic issues related to the Marta mouse motion when she walks on top of a horizontal bicycle wheel, which is free to rotate l…
On the work of internal forces
Julio Guemez, Manuel Fiolhais, Lucilia Brito
We discuss the role of the internal forces and how their work changes the energy of a system. We illustrate the contribution of the internal work to the variation of the system's e…
Dissipation effects in mechanics and thermodynamics
Julio Guemez, Manuel Fiolhais
With the discussion of three examples, we aim at clarifying the concept of energy transfer associated with dissipation in mechanics and in thermodynamics. The dissipation effects d…
The physics of articulated toys - a jumping and rotating kangaroo
J. Güémez, M. Fiolhais
We describe the physics of an articulated toy with an internal source of energy provided by a spiral spring. The toy is a funny low cost kangaroo which jumps and rotates. The study…
Thermodynamics in rotating systems -- analysis of selected examples
Julio Güémez, Manuel Fiolhais
We solve a set of selected exercises on rotational motion requiring a mechanical and thermodynamical analysis. When non-conservative forces or thermal effects are present, a comple…