Question

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

Comments

But how I want explaination

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Can you pls tell which book is this

Answer 1

The correct option is (3) 4.

Explanation:

The required number of vectors is 4.  suppose A,B,C, D are four vectors and no three of them are coplaner. if the resultant of A and B be X, and resultant of C and D be Y.  if X, and Y be equal in magnitude but in opposing directions, that's the only way the resultant of A, B, C, D be zero, without any three of them being in the same plane. 

Answer 2

Correct answer is 4

Four vectors in different planes may give zero resultant.