Two particle P and Q are moving in gravity free space with their respective velocities V_p = -i + 2j -2k  ms-1 and V_p = -4i + 2j + 3k  ms-1. At t = to , the separation between them is minimum. Find the value of 10 to .

Q: Two particle P and Q are moving in gravity free space with their respective velocities $V_P = -\hat{i} + 2\hat{j} -2\hat{i}$  ms^-1 and $V_Q = -4\hat{i} + 2\hat{j} + 3\hat{k}$ ms^-1. At t = t_o , the separation between them is minimum. Find the value of 10 t_o .

Ans. 5