A force vecF= (3hati+4hatj) N acts on a ...

A force `vecF= (3hati+4hatj)` N acts on a body and displaces it by `vecS= (3hati+4haj)m`. The work done (W= `vecF*vecS`) by the force is :

10J

12 J

19 J

25 J

Text Solution

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The correct Answer is:

`W= vecF*vecS= (3hati+4hatj)*(3hati+4hatj)=9+16= 25J`

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