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A force \vec F = 5 \hat i - 4 \hat j +\hat k  moves a body of  mass 10 Kg from position (3,4,5) to a position (6,7,8) . Find the work done 

A.

8 J 

B.

10 J 

C.

6 J 

D.

4 J 

Answers (1)

 \vec{r}=3(\vec{i}+\vec{j}+\vec{k})

and work done =\vec{F}.\vec{r}=6J

 

Posted by

Safeer PP

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