A force F = 6i + 2 j – 3k acts on a particle and produces a displacement of S = 2 i – 3 j + x k . If the work done is zero, then value of x is

Q: A force $\vec{F} = 6 \hat{i} + 2 \hat{j} – 3 \hat{k}$ acts on a particle and produces a displacement of $\vec{S} = 2 \hat{i} – 3 \hat{j} + x \hat{k}$. If the work done is zero, then value of x is

(a) – 2

(b) 1/2

(c) 6

(d) 2

Ans: (d)