Question

How many minimum number of vectors in different planes can be added to give zero resultant :

• A. 2
• B. 3
• C. 4
• D. 5

Answer 1

The correct option is C 4

If the vectors are in different planes, they would need to cancel components in at least 3 dimensions to make the resultant 0.

Hence, we would need at least 4 vectors such that 3 of them when added cancel their components in a plane and add to get a single vector perpendicular to this plane. Fourth vector would nullify this perpendicular vector.