question_answer

A particle acted on by constant forces \[4\,\hat{i}+\hat{j}-3\,\hat{k}\] and \[3\,\hat{i}+\hat{j}-\,\hat{k}\] is displaced from the point \[\hat{i}+2\hat{j}+3\,\hat{k}\] to the point \[5\,\hat{i}+4\,\hat{j}+\,\hat{k}\]. The total work done by the forces is     AIEEE  Solved  Paper-2003

A)                                         20 units           

B)                       30 units                               

C) 40 units     

D)       50 units

Correct Answer: C

Solution :

        Total force     Displacement Total work done = F . d                                          units