A force F =(6hati +2hatj -3hatk)acts on a particle and produces a displacement of vecs = (2hati-3hatj+xhatk). If work done is zero, the value of x is

A force F =(6hati +2hatj -3hatk)acts on a particle and produces a disp

1.	A force F =(6hati +2hatj -3hatk)acts on a particle and produces a displacement of vecs = (2hati-3hatj+xhatk). If work done is zero, the value of x is
Answer» `-2` `1/2` `6` `2` Solution :`W = vecF. Vecs = (6 hati + 2 hatj - 3hatk).(2 hati - 3 hati + XHATK)` `= 12 - 6 - 3X` As W = 0 (Given) `:.` 12 - 6 - 3x= 0 or x = 2`.