Un modèle pour la compréhension des propriétés des liquides

Abstract

Cetarticleprésente uneproposition didactique visantà favoriserla compréhension des concepts physiques relatifs à l'hydrostatique et en particulier au principe de Pascal. La proposition, qui est insérée dans un contexte d'hypertexte, se fonde sur l'utilisation d'un modèle quirendcompte despropriétés fondamentales d'un liquide, comme son action sur les parois du récipient qui le contient ou la transmission isotrope des forces qui s'exercent sur lui. Les affinements successifs du modèle permettent d'aboutir à la définition de la pression dans les liquides.

Developing relevant teaching strategies during in-service training

“…The concept of tension was compared to that of pressure, a parameter that describes the condition of a liquid when forces act on its surface and/or on its bulk (for example, due to gravity). In this phase of work the exchange of ideas within the group of teachers was assisted by using a model of a liquid developed to explain the behaviour of a liquid at rest (Borghi et al 1996). The model is made of real objects such as small disks and spheres (lead pellets), as shown in figure 1.…”

In-service teacher education: an attempt to link reflection on physics subjects with teaching practice

“…In order to illustrate the main features of our approach, we report here the work dealing with friction. The activity on hydrostatics and the role played in its development by a multimedia hypertext have been described in detail elsewhere (Borghi et al 1996).…”