Titlebook: History of Virtual Work Laws; A History of Mechani Danilo Capecchi Book 2012 Springer Milan 2012 Fundaments of mechanics.History of mechani

在前面

The treatises of mechanics,resented. To point out the introduction of modern term ., the introduction of the problems associated with friction and finally the change in the ontological status of virtual work. From simple mathematical to physical magnitude.

緯線

重疊

Arabic and Latin science of weights,efficacy of a weight on a scale is the greater the more its virtual displacement is next to the vertical. Another VWL is associated with the resistance of a weight to be lifted, which depends on the lifting entities in a given time. In formulas: . p . h . p/n . nh.

享樂主義者

Italian Renaissance statics, according to which anything that can lift a weight . of a height . can raise . of .. In the central part the contributions of Girolamo Cardano, Guidobaldo dal Monte and Giovanni Battista Benedetti are presented, all of which somehow refer to a VWL.

群島

Insufficient

Minutes

The Jesuit school of the XVIII century,ion of Angiulli and his demonstration of VWL is presented in the . route. This is perhaps the first convincing demonstration of a VWL. In the second part the contribution of Vincenzo Riccati is presented.

interpose

Explosive

使長胖

Thermodynamical approach,This chapter is devoted to the use of the VWL where to virtual work is given a mechanical meaning. In the first part, notes on mechanics derived from Pierre Duhem’s thermodynamics are presented. In the second part the derivation of a VWL from the law of conservation of energy is shown.