1. The problem statement, all variables and given/known data Can 1. three 2. four vectors in different planes add up to give a zero resultant? 2. Relevant equations 3. The attempt at a solution 1. Yes. 2. Yes. 1. suppose that we resolve the 3 vectors in i,j,k components. Putting each one of them zero in the respective three vectors to make them in 3 separate plane. Cant they be zero? 2. similar as above. the only thing is that the fourth vector has none of its components zero. Am I right?