Question

18. If vector |A+B| = |A|This necessarily implies
(a) Vector B =0 (b) A, B are antiparallel
(c)A, B are perpendicular
(d) vectorA . vectorB​

Answer 1

Option A is the right answer
b) is incorrect because then the resultant would be less than A
c) if they were perpendicular, resultant would be sqrt of (A^2 +B^2)
d) nope