Question

Punctul 1 de la VI





Rapid ca rog​

Answer 1

Răspuns:

F= F2 - F1

F= 7-12= - 5N

R rezultanta

R(vect.) = F (vect.) + F3 (vect.)

R^2= F^2 + F^3 + 2F x F^3 cos

R^2= (-5^2) + 5^2 + 2 x 5 x 5cos

25+25+50cos 120°

50+50° - (1/2) = 50-25=25

R=rad25=5N

(^n=la puterea)