2. Questions Bank
  3. JEE Main & Advanced
  4. Physics
  5. Vectors

JEE Main & Advanced Physics Vectors Question Bank Multiplication of Vectors

  • question_answer
    A force \[\overrightarrow{F}=(5\hat{i}+3\hat{j})\]Newton is applied over a particle which displaces it from its origin to the point \[\overrightarrow{r}=(2\hat{i}-1\hat{j})\] metres. The work done on the particle is                      [MP PMT 1995]

    A)                 ? 7 J      

    B)                 +13 J

    C)                 +7 J       

    D)                  +11 J

    Correct Answer: C

    Solution :

                        \[W=\vec{F}.\vec{r}=(5\hat{i}+3\hat{j})(2\hat{i}-\hat{j})=10-3=7\]J.


You need to login to perform this action.
You will be redirected in 3 sec spinner