A particle is displaced from a position (2i -j + k ) to another position (3i + 2 j -2 k) under the action of the force of ( 2i + j – k). The work done by the force in an arbitrary unit is

Q: A particle is displaced from a position $(2\hat{i} -\hat{j} + \hat{k}) $ to another position (3\hat{i} + 2 \hat{j} -2 \hat{k}) under the action of the force of ( 2\hat{i} + \hat{j} – \hat{k}). The work done by the force in an arbitrary unit is

(a) 8

(b) 10

(c) 12

(d) 16

Ans: (a)