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Expression particulier de chute libre

Rappel

Comment fut trouvée la valeur de l’accélération de pesanteur ?

Motivation

Comment s’appelle la normalité et la molalité ?

Annonce du sujet

Qu'allons-nous étudier aujourd'hui?

Analyse

Quelle est l'expression de la chute libre?

Exemple

On lance une Balle vers le bas avec une vitesse de 10m/sec. Sachant que la Balle a été lancée à une hauteur de 10m, elle arrive au sol avec une vitesse de ?

Comment calculer la vitesse Vo ?

Synthèse

Une Balle lancée verticalement de haut passe par le point A après 3 secondes en montant et après 2 secondes  en descendant.

Calculer la vitesse initiale ?

Les valeurs furent trouvées en France comme suit :

H=4,90m, t=sec

La normalité et la molalité sont les expressions de concentration.

Aujourd'hui, nous allons étudier l'Expression particulier de chute libre.

L’expression particulière de la chute libre

Pour un objet lancé vers le bas avec une vitesse Vo verticale,

Exemple

On lance une Balle vers le bas avec une vitesse de 10m/sec. Sachant que la Balle a été lancée à une hauteur de 10m, elle arrive au sol avec une vitesse de ?

Solution

Une Balle lancée verticalement vers la hauteur passe en un point de la hauteur principale après un t1 en montant et repose après un t2 en descendant.

 

MessagesTimelineExceptionsViews7RouteQueries16Models18GateSessionRequest
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