Physique formules Flashcards

1
Q

Le travail

A

W = F x d

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2
Q

Le travail en fonction d’un angle

A

W = F x d x cos a

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3
Q

Puissance

A

P = W / t

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4
Q

Moment d’une force

A

Mxx de F = F x d

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5
Q

effort resistant

A

si la charge peut rouler R = p x r
si la charge glisse R = p x gl

si pente on ajoute + ou - p x pente

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6
Q

effort a la jante

A

ej = rendement x puissance motrice / vitesse

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7
Q

adherence

A
A = P x a (si 4 roues motrice)
A = 2P/3 x a (si 2 roues motrice)
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8
Q

effort au crochet

A

si A>Ej alors Ec = Ej - Rtract

si A

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9
Q

Rendement

A

rendement = Wu/Wf

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