Calculez la plage de valeurs de la force \( P \) pour laquelle le système restera au repos. Données : \( \mu,\ W,\ Q,\ \alpha,\ r \).

Calculer les réactions du sol aux points A et B ainsi que l'angle d'inclinaison à l'état d'équilibre. Données : \(Q, a, \mu\).

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