2. Sample Papers
  3. NEET

NEET Sample Paper NEET Sample Test Paper-36

  • question_answer
    A force of\[2\hat{i}+3\hat{j}+4\hat{k}\,N\]acts on a body for 4 second and produces a displacement of \[(3\hat{i}+4\hat{j}+5\hat{k})m.\] The power used is

    A)  9.5W         

    B)  7.5W

    C)  6.5 W        

    D)  4.5W

    Correct Answer: A

    Solution :

     \[P=\frac{\vec{F}.\vec{s}}{t}=\frac{(2\hat{i}+3\hat{j}+4\hat{k}).(3\hat{i}+4\hat{j}+5\hat{k})}{4}\] \[=\frac{38}{4}=9.5\,W\]


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