Question

doi vectori au modulele a=3 unitati si b =4 unitati. Calculati rezultanta lor daca:a) vectprii au aceeasi directie si acelasi sens b) vectorii au aceeasi directie si sens opus c) vectori au directii perpendiculare

Answer 1

F1=3N
F2=4N

a)
R(vector)=F1(vector)+F2(vector)
R=F1+F2
R=3N+4N
R=7N

b)
R(vector)=F1(vector)+F2(vector)
R=F2-F1
R=4N-3N
R=1N

c)
R(vector)=F1(vector)+F2(vector)
R^2=F1^2+F2^2
R=radical F1^2+F2^2
R=radical 3^2N^2+4^2N^2
R=radical 9N^2+16N^2
R=radical 25N^2
R=5N