question_answer

When a vector is multiplied with non dimensional scalar, it will be a vector having dimensions as that of the given vector. Under what condition, the three vectors (i) cannot give zero resultant (ii) can give zero resultant?

Answer:

(i) When three vectors are not lying in one plane, they cannot produce zero resultant. (ii) When three vectors are lying in a plane and are represented in magnitude and direction by the three sides of a triangle taken in the same order.