question_answer

A particle moves from position \[{{\vec{r}}_{1}}=\,3\hat{i}+2\hat{j}-6\hat{k}\] to position \[{{\vec{r}}_{2}}=14\hat{i}+13\hat{j}+9\hat{k}\] under the action of force \[4\hat{i}+\hat{j}+3\hat{k}\,N.\] The work done will be                              [Pb. PMT 2002,03]

A)             100 J  

B)             50 J

C)             200 J  

D)             75 J