If the position vectors of two masses of 10 kg and 30 kg are (i + j + k) and (-i - j - k)

Question

If the position vectors of two masses of 10 kg and 30 kg are \((\hat{i} + \hat{j} + \hat{k})\ and\ (-\hat{i} - \hat{j} - \hat{k})\), then the centre of mass will be:

Answer 1

Correct option is : (a) \(-\frac{(\hat{i} +\hat{j} + \hat{k})}{2}\)