Physique formules

Question 1

Le travail

Answer 1

W = F x d

Question 2

Le travail en fonction d’un angle

Answer 2

W = F x d x cos a

Question 3

Puissance

Answer 3

P = W / t

Question 4

Moment d’une force

Answer 4

Mxx de F = F x d

Question 5

effort resistant

Answer 5

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

Question 6

effort a la jante

Answer 6

ej = rendement x puissance motrice / vitesse

Question 7

adherence

Answer 7

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

Question 8

effort au crochet

Answer 8

si A>Ej alors Ec = Ej - Rtract

si A

Question 9

Rendement

Answer 9

rendement = Wu/Wf