Question

Mecânica geral 1,MECÂNICA

Answer 1

1) 
Py=P*cos20°=75*cos20°=70,5N
Qy=Q*cos35°=125*cos35°=102,4N

Px=P*sen20º=75*sen20º=25,7N
Qx=Q*sen35º=125*sen35º=71,7N



Rx=-Px+Qx=-25,7+71,7=46,0N

Ry=-Py-Qy=-70,5-102,4=-172,9N

R=Raiz(Rx^2 + Ry^2)=raiz(46^2 +172,9^2) =179N

tg@=-172,9/46=-3,7586;

(tg-3,7586)^-1= 75,1º