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Humbert, Richard – Physics Teacher, 2010
A force acting on just part of an extended object (either a solid or a volume of a liquid) can cause all of it to move. That motion is due to the transmission of the force through the object by its material. This paper discusses how the force is distributed to all of the object by a gradient of stress or pressure in it, which creates the local…
Descriptors: Physics, Science Instruction, Motion, Scientific Principles
Heavers, Richard M. – Physics Teacher, 2007
Our physics students like to watch a ball bouncing underwater. They do this by dropping a weighted plastic ball into a 1000-ml cylinder filled with a linearly stratified salt-water solution at room temperature. The ball oscillates and comes to rest at about mid-depth. Its motion is analogous to the damped vertical oscillations of a mass hanging…
Descriptors: Science Instruction, Scientific Principles, Mechanics (Physics), Water
de Izarra, Charles; de Izarra, Gregoire – European Journal of Physics, 2011
This paper deals with the study of a toy CD hovercraft used in the fluid mechanics course for undergraduate students to illustrate the lubrication theory described by the Stokes equation. An experimental characterization of the toy hovercraft (measurements of the air flow value, of the pressure in the balloon and of the thickness of the air film…
Descriptors: Undergraduate Students, Mechanics (Physics), Toys, College Science
Bringuier, E. – European Journal of Physics, 2009
The paper analyses particle diffusion from a thermodynamic standpoint. The main goal of the paper is to highlight the conceptual connection between particle diffusion, which belongs to non-equilibrium statistical physics, and mechanics, which deals with particle motion, at the level of third-year university courses. We start out from the fact…
Descriptors: Thermodynamics, Mechanics (Physics), Scientific Concepts, Science Instruction
Binous, Housam – Chemical Engineering Education, 2007
We study four non-Newtonian fluid mechanics problems using Mathematica[R]. Constitutive equations describing the behavior of power-law, Bingham and Carreau models are recalled. The velocity profile is obtained for the horizontal flow of power-law fluids in pipes and annuli. For the vertical laminar film flow of a Bingham fluid we determine the…
Descriptors: Undergraduate Study, Mechanics (Physics), Motion, Profiles