Question

determine the projection of u = 1.6 vector i + 3.3 vector j in the vector v = -2.1 vector i - 0.5 vector j direction

Answer 1

u dot v / |v|

(1.6*-2.1 + 3.3*-0.5) / sqrt(2.1^2 + 0.5^2)

-2.32